Datatables Manipulate Data

Am using DataTable in C# and am trying to manipulate, modify one of the column. Since jQuery 1. Use DataTable to store data in memory from databases and other data sources. Data Manipulation. NET 2 comments There's a question on vb forums on how to apply LINQ grouping and aggregate function sum to a datatable object. Notice: Undefined index: HTTP_REFERER in /home/forge/newleafbiofuel. Data manipulation; Exporting data to a tabular data file; Supplying DataTables inline with non-standard string literals;. Keeping these related operations together allows for: concise and consistent syntax irrespective of the set of operations you would like to perform to achieve your end goal. Using a DataTable object doesn't necessarily bring anything different to the party than the techniques I showed in the first article. Many translations are already. If you don't agree with how R defines a column data type, you can easily convert the column to a different data type. This tip assumes you know the basics of jQuery. Using these callback functions we can do various modifications to the resultant table dynamically. Data tables are the simplest types of spreadsheet data with rows and columns, with or without headers. Gmail-style Table Rows Selection With Checkboxes - jQuery Selectr. ) User-contributed DataTable translation files: Separate from the plugin i18n, there is a separate internationalization for the DataTable widget. Create Data. The example given below shows how a callback function can be used to total up visible (and hidden) data, taking into account all of DataTable's features (pagination, filtering etc). To accomplish this, you need to perform the following steps:. Upon completion of the course, you will be able to use data. 9 and earlier for reference only. Manipulating data directly in a table isn’t always practical. I Define DataTable columns in screen painter, bind grid to datatable e fill values of datatable with SetValue Method. table R package and syntax The cheat sheet will guide you from doing simple data manipulations using data. By default, datatable() shows the column names of the data in the table, and you can use a custom character vector for the table header. Add jquery datatable. You may have already read How to query a SQL database in C#? and How to insert a row into a Microsoft SQL database using C#? but you are looking for more information on how to insert rows using a DataTable. So what you might need to do is put the data into a collection, manipulate it in the collection, and then display it in your data table. There are two ways to create a DataTable: by using the Fill() method of the DataAdapter class and by building the DataTable programmatically. There are two ways to manipulate a DataTable. getGlobalDatatable method has the following command format(s): datatable. Datatables excel customize header. Data namespace. Manipulating data directly in a table isn’t always practical. Generally, we use following Data Manipulation Commands and methods to create data in an HBase table: put in command. Data tables can contain: Interactive components (such as chips, buttons, or menus) Non-interactive elements (such as badges) Tools to query and manipulate data. ready(function() { $('#example'). Simple jQuery Data Grid Widget Plugin. Abstract: In this article, we will explore how to convert a datareader to a DataTable using two approaches. Blog Find Help Online Mindfully — and Effectively!. Clone For Each parentRow As DataRow In Collection_In. In datatable, the primary vehicle for all these operations is the square-bracket notation inspired by traditional matrix indexing but with more functionalities. Because the returned data type isn’t always consistent with matrix indexing, it’s generally safer to use list-style indexing, or the drop=FALSE op. Here I show how to set this up and use a Rails application as the data source. How to create DataSet without Databse Dataset represents a collection of data retrieved from the Data Source. Using a DataTable object doesn’t necessarily bring anything different to the party than the techniques I showed in the first article. The DataTable Im referring to is "System. This is a "global" version of preCreate , preEdit and preRemove and can be used to manipulate the data that will be added to the DataTable for all three actions. Use DataTable to store data in memory from databases and other data sources. As the charts and maps animate over time, the changes in the world become easier to understand. This technique is somewhat complex and requires manipulations with the form as described below. There are a few possibilities. Ideally, I want to create the DataTable in the editor (which works so far), and then reference that instance of the DataTable in a C++ class in order to access individual rows and manipulate information. The DataTableCollection contains zero or more DataTable objects. In datatable, the primary vehicle for all these operations is the square-bracket notation inspired by traditional matrix indexing but with more functionalities. With LINQ queries we can query different data sources such as XML. NET 17 December 2014 Comments Posted in ASP. 9, and DataTables v1. getGlobalDatatable method has the following command format(s): datatable. DataTables itself provides a very good API for data manipulation (adding rows, deleting rows, etc. The app is pretty much identical to the one for employee, and the data manipulation bit is much simpler: With this much simplified scenario, everything worked as advertised. Chrissy is a Cloud and Datacenter Management & Data Platform MVP who has worked in IT for over 20 years. A Table object holds the data of a table parsed from a feature file and lets you access and manipulate the data in different ways. It has a name, rows, and columns. One of the keys to getting a good understanding of Pandas is to understand that Pandas is mostly a wrapper around a. Here is a simple example: I have a data frame showing incremental claims development by line of business and origin year. Reading binary data using jQuery Ajax – Henry Algus. NOTE: The h:dataTable tag represents a capable component/renderer pair. The examples on this page attempt to illustrate how the JSON Data Set treats specific formats, and gives examples of the different constructor options that allow the user to tweak its behavior. Looping through a DataTable in PowerShell. In JSF, “h:dataTable” tag is used to display data in a HTML table format. You need to assign columns from your data to columns of the DataTable. The Pandas library is the most popular data manipulation library for Python. She is the creator of the popular SQL PowerShell module dbatools and holds a master's degree in Systems Engineering. 10 is the current release and is now available. net windows app that uses a tabcontrol have a main form and a search page in 2 tabs. C# DataGrid Control: Render and Manipulate Data Tables April 25, 2014 by Richa C# is a simple, modern, general-purpose, object-oriented programming language developed by Microsoft. Previous / next editing buttons Often when editing data in tables, you may wish to edit consecutive records. The examples on this page attempt to illustrate how the JSON Data Set treats specific formats, and gives examples of the different constructor options that allow the user to tweak its behavior. Then the data is displayed on the computer screen using a dgv. js JavaScript libraries. The easiest way to manipulate data using ADO. Back to main IronPython scripting page Introduction With TIBCO Spotfire 7. Manipulating Data in a DataTable. DataTables is a table enhancing plug-in for the jQuery Javascript library, adding sorting, paging and filtering abilities to plain HTML tables with minimal effort. Handling DataTable Events Provides information about the events available for use with a DataTable, including events when column values are modified and rows are added or deleted. This document is genereated in protrait size with 8 columns. And that's it! The great advantages of using this API to help construct your tables is that it has features like Column formatting, paging and sorting, as well as the ability to totally manipulate the look and feel of your table. table and attempts to mimic its core algorithms and API. NET is to create a DataTable object containing the resultset of a table, query, or stored procedure. The filling up of the DataTable should be dynamic and code should not be in App Context. The DataAdapter uses Command objects to execute SQL commands at the data source to both load the DataSet with data, and reconcile changes made to the data in the DataSet back to the data source. table R package and syntax The cheat sheet will guide you from doing simple data manipulations using data. Automatically detects separators, headers, column types, quoting rules, etc. Handling DataTable Events Provides information about the events available for use with a DataTable, including events when column values are modified and rows are added or deleted. tables, including built-in groupwise operations. The childNodes list includes all child nodes, regardless of what their name or type is. It is close in spirit to pandas or SFrame; however we put specific emphasis on speed and big data support. Chapter 5, Displaying Data Using DataTable: No web application is complete without a page that has a table of data. This is a "global" version of preCreate , preEdit and preRemove and can be used to manipulate the data that will be added to the DataTable for all three actions. The new version of VIBlend Controls for WinForms is coming in a few weeks and will deliver an upgrade to the DataGridView control with new features, better UI and styling capabilities. DataTable provides the header and footer callback functions to manipulate HTML data with an intuitive user interface. NET DataTable Computes and Column Expressions in PowerShell Posted on February 3, 2015 by Chrissy LeMaire — No Comments ↓ As a SQL Server DBA, I'm used to SQL being able to perform aliasing, super fast subselects, and easy aggregation. I hope this details would help to debug my problem. Write Data In Excel Using Uipath. In this example I have used one. Rails & DataTables A wrapper around datatable's ajax methods that allow server-side pagination, ordering & searching out of box in a rails app View on GitHub Download. 03/30/2017; 2 minutes to read +4; In this article. DataGrid manages the sorting, filtering, grouping and summaries during data updates based on SfDataGrid. an expression to create a table widget (normally via datatable()), or a data object to be passed to datatable() to create a table widget. From: Adaikalavan Ramasamy Date: Mon 07 Nov 2005 - 05:15:50 EST. // this returns a DataTables API instance $('#foo'). it doesn't make any assumptions about your data or how you: filter, sort or page it. Let us learn practically how to convert a LINQ query result into a DataTable by creating a sample application. I have a filled datatable that I want to copy the column names to so I can manipulate the first datatable and store in the second. In many scenarios developers would like to combine the great simplicity of Asp. If we are going to fetch data from a single database table then DataTable is better choice. NET console application to do basic data manipulation is overkill. The following JSF 2. As the name suggests, the package is closely related to R's data. It then adds the data that you entered on the dialog as a new row in the DataTable. reloadData() method which would trigger the callback LazyDataModel. table Learn R for data science Interactively at www. Manipulating the table with DOM and CSS Getting a text node from the table. WP Jquery Data table plugin can help the WordPress website owner to insert table anywhere for displaying any information in tabular form, which will also have some cool features like option of selecting no. Then i 'm binding theese datatable to a datagrid. The user has the option to store the result in a new datatable as well. table and attempts to mimic its core algorithms and API. jQuery is a fast, small, and feature-rich JavaScript library. For example, you can easily display JSF components in table cells, add headers and footers to tables, and manipulate the look and feel of your. LINQ is an excellent way for querying different data sources using C#. Manipulating data from datagrid, datatables, Using Current RowIndex I have a vb. net windows app that uses a tabcontrol have a main form and a search page in 2 tabs. A DataSet object represents a schema (either an entire database or a subset of one). data() method has already retrieved them. If you have used DataTables in Shiny before (specifically, before Shiny v0. table for speed, dplyr for readability and convenience I extensively use both dplyr and data. Learn vocabulary, terms, and more with flashcards, games, and other study tools. This doesn't work at all in Seam, it seems that I can't use selection tag at all. Select against the data. R datatable remove search. 0, the datatable component is deprecated. Manipulating data from datagrid, datatables, Using Current RowIndex I have a vb. I ended up using the jQuery DataTables plugin (which I've successfully used in the past) with a new DataTables plugin I found called Checkboxes. Angular2 datatable for handling large and complex datasets in table format. In typical database oriented applications, DataSet and DataTable are used a lot to manipulate data. Excel and DataTables Automation Workbooks are references to Excel files, regardless of the data, format and layout they contain. For a one dimensional vector, the index [2] retrieves the second element of that vector. 10 a new Data Table Source View API is available that lets you read information on the different operations and transformations that are performed to construct a data table in an analysis, what is referred to as the data table source view. Data manipulation operations such as subset, group, update, join etc. After creating a DataTable in a DataSet, you can perform the same activities that you would when using a table in a database. The basic set of R tools can accomplish many data table queries, but the syntax can be overwhelming and verbose. It also support full datatable configuration parameters. Instead of using different querying languages such as XPath or SQL ,we can use C# regardless of the type of data source. The examples on this page attempt to illustrate how the JSON Data Set treats specific formats, and gives examples of the different constructor options that allow the user to tweak its behavior. That series does not require any values or name so those elements can be removed from the data table. Example of Create Data Manipulation HBase Command:. Graph data visualization with D3. DataTables 1. 🎉 New! Web Push Notifications for Chatkit. Data tables display information in a grid-like format of rows and columns. The DataSet class is useful to hold chunks of data read from the database. First it uses the childNodes attribute to get the list of child nodes of mycel. table which will be covered in the next set. So what you might need to do is put the data into a collection, manipulate it in the collection, and then display it in your data table. This can be done just by placing the < o:singleRowSelection> tag in the tag and configuring its attributes to customize selection behavior and appearance. Columns Configuration. You can create static tables in DAX using the DATATABLE function. JSF dataTable: JSF h:dataTable tag is used to render and format HTML table element. LINQ is an excellent way for querying different data sources using C#. Gmail-style Table Rows Selection With Checkboxes - jQuery Selectr. This site contains the legacy documentation for DataTables v1. Hell everyone i have datatables set up right now and i want to convert it over to server-side processing right now i am using this code which seems to be very inefficient now that the database is getting larger. Using these callback functions we can do various modifications to the resultant table dynamically. The Create, Update, and Delete functionality all did what I expected. Data tables display information in a grid-like format of rows and columns. Alternatively, we will also explore converting the DataReader to DataTable manually. Read 1 : Convert MySQL Data in JSON Format Read 2 : How to Read/Display JSON Data using jQuery in HTML required CDN's following are the required CDN's i have used here for the datatables included with bootstrap design, just add css link within your head tag and js link just below the closing body tag. While in Editor it is perfectly feasible to save a row, then click to edit another, it can be more convenient to provide Previous and Next buttons as well as the regular save button to the end user. Interactive heatmaps with D3. Manipulating DataTables with ADO. Using Angular Datatable. In recent months we’ve refreshed three sections of the RightScale dashboard: Last September, we released a UI for Amazon Web Services (AWS) Simple Queue Service (SQS), and in February we released updated UIs for AWS Elastic Load Balancer (ELB) and Simple Storage Service (S3). js datatable component for Laravel that works with Bootstrap. The JSON output from different Server APIs can range from simple to highly nested and complex. Learn to build an app that handles large quantities of data and display it in a realtime table using JavaScript (jQuery), DataTables and Bootstrap. Learn how UiPath operates with Excel and Data Tables: - Excel application scope - Opening a workbook - access modes - Read and write range - Output datatable Watch a practical example of how to. » Read more. Let us learn it practically how to convert LINQ query result to Datatable by creating one simple application as Now create the project as: "Start" - "All Programs" - "Microsoft Visual Studio 2010". This example introduces two new DOM attributes. The problem I am having is displaying data that has to have some manipulation done to it before data is passed to the datatables. The problem is that I make a new one after filling the first one with my data, but when I set the second on equal to the first one, I change data in one and it changes it in the other. Would anyone want to help me convert this over to a server sided script like the one in. table and is the main axis of intersection between these two libraries). Previous / next editing buttons Often when editing data in tables, you may wish to edit consecutive records. It has all the features you would expect from any other datatable but in a light package with no external dependencies. A Table object holds the data of a table parsed from a feature file and lets you access and manipulate the data in different ways. Create a Model folder in Solution Explorer and create a new class in the Model folder. table is a library in R for fast manipulation of large data frame. js and DataTables. The data set may comprise data for one or more members, corresponding to the number of rows. Filling a DataTable from the DataRow array using CopyToDataTable() 32. In datatable, the primary vehicle for all these operations is the square-bracket notationinspired by traditional matrix indexing but with more functionalities. Symantec helps consumers and organizations secure and manage their information-driven world. After a DataSet has been populated, you often need to use it in conjunction with other DataSet objects. x filling a DataSet or a DataTable meant quite some work. The second option essentially does the above, but uses a LINQ query on the DataTable to group and compute. Like the deadline_dt column above. To meet this goal, DataTables is developed with two distinct groups of users in mind: You the developers using DataTables. The functionality I am looking for, at least for this version, is when the user clicks on the checkbox, to remove the record from the datatable. render DT has a wide array of options available to it for rendering different types of data orthogonally (ordering, searching, display etc), but it can be used very simply to manipulate the content of a cell, as shown here. fnSetColumnVis (iCol, bShow, bRedraw) Show a particular column. You can create static tables in DAX using the DATATABLE function. The course concludes with fast methods of importing and exporting tabular text data such as CSV files. We use the PHP json_encode function to transform the data in JSON so that DataTables and our own jQuery script can read and parse them. Modifying an existing asset is the recipe for having incompatible mods. Step Definitions that match a plain text Step with a multiline argument table will receive it as an instance of Table. The form’s Load event handler set that object equal to a DataTable. It can contain tables and relationships between those tables. PowerShell) submitted 4 years ago * by lostmojo I am working with a large datatable of 3 columns, none of the columns are unique and it is 40,480 rows. DataSet class, an alternative to disconnected recordsets, is an example of these upgrades. In QTP, three objects - DataTable (The run-time Data Table), DTParameter (A parameter (column) in a sheet in the run-time Data Table) and DTSheet (A sheet in the run-time Data Table) have different properties and methods to help you further manipulate the data in any cell. The following sections explain how to use DataTables. For implementing the server-side processing, I have used the DataTables SSP class to build the data request with the required parameters. 2) currently uses DataTables v1. Some of dplyr's key data manipulation functions are summarized in the following table:. Last update: Aug 23, 2019 » Contribute » Show contributors. We pass the data using a sub array called 'data'. In DataTables, we can attach this token to headers, data or global Ajax header. Plugin's settings will display 'WP jQuery DataTable' tab. As the charts and maps animate over time, the changes in the world become easier to understand. Manipulating Data. Manipulating DataTables with ADO. In the other version we use the original mechanism of the jQuery DataTable. Angular2 datatable for handling large and complex datasets in table format. Imported from legacy forums. The “data” you get should be the original dataset for the row. table DataCamp Learn Python for Data Science Interactively Creating A data. reloadData() method which would trigger the callback LazyDataModel. Although depending on your data and what you need to do with. Represents a two-dimensional, mutable table of values. DataTable Relational Operators in C# - JOIN Method. This activity helps a user to change the datatype of a datatable column to any user selected datatype. function - the function given will be executed whenever DataTables needs to set or get the data for a cell in the column. For example, if we don't want the Source column defined as a Factor but as a Character instead, we use the as. The form’s Load event handler set that object equal to a DataTable. DataTables can be constructed statically, with pre-defined, hard-coded data, or can be populated from a database query. Hell everyone i have datatables set up right now and i want to convert it over to server-side processing right now i am using this code which seems to be very inefficient now that the database is getting larger. Chrissy is a Cloud and Datacenter Management & Data Platform MVP who has worked in IT for over 20 years. If you are displaying a form in a table powered by jQuery DataTables library, you probably know it is a challenge to submit form data from all pages, not just current page. In the exercises below we cover the some useful features of data. In this section, you'll learn how to create a new DataSet based on an existing one as well as merge it with other DataSet objects. While DataSet can be used to represent a database as a whole, a DataTable object can be used to represent a table in the Database/DataSet. The classes and interfaces in Microsoft. What I am trying to do is convert an iQueryable result from a LINQ query to a datatable for more. The DataTable widget is provided by DataTables. I Define DataTable columns in screen painter, bind grid to datatable e fill values of datatable with SetValue Method. Data tables are the simplest types of spreadsheet data with rows and columns, with or without headers. One should instead use a DataTable (dt) to store and manipulate the data and then show the data on the screen with a dgv. by Abdul-Wahab April 25, 2019 Abdul-Wahab April 25, 2019. A Table object holds the data of a table parsed from a feature file and lets you access and manipulate the data in different ways. Step Definitions that match a plain text Step with a multiline argument table will receive it as an instance of Table. Example: I have DB table of materials with parameters associated with each one. ) The program converts the DataSource into a DataTable. Modding DataTables (e. Manipulating Data. In this example I have used one. Like the deadline_dt column above. There are many ways to manipulate the data in an analysis file using the Spotfire. A live reference to a DataTable; any changes in the DataTable data is immediately reflected in the view. Please see the data. Manipulating the change dataset in Sync Fx March 7, 2011 · by JuneT · in Sync Framework · 18 Comments One of the most common scenario asked in the Sync Fx forum is on manipulating the changes selected during synchronization before they get applied. Working with rows is a fundamental part of DataTables, and you want to be able to easily select the rows that you want from the table. Explains how to use DataTable events to examine changes to data in the table. Learn to build an app that handles large quantities of data and display it in a realtime table using JavaScript (jQuery), DataTables and Bootstrap. 2), you may need to change some parameter names for your DataTables, because Shiny. It is close in spirit to pandas or SFrame; however we put specific emphasis on speed and big data support. Data manipulation operations such as subset, group, update, join etc. I was hoping you might be able to assist with using this tool. Since jQuery 1. I ended up using the jQuery DataTables plugin (which I've successfully used in the past) with a new DataTables plugin I found called Checkboxes. Using these callback functions we can do various modifications to the resultant table dynamically. We have a SQL database and an ACCESS database. WP Jquery Data table plugin can help the WordPress website owner to insert table anywhere for displaying any information in tabular form, which will also have some cool features like option of selecting no. ) The program converts the DataSource into a DataTable. Without seam, I just add selection tag to datatable, and I add SimpleSelection property to backing-bean. php(143) : runtime-created function(1) : eval()'d code(156) : runtime-created. 3D scatterplots and globes. R offers a wide range of tools for this purpose. DataSet class, an alternative to disconnected recordsets, is an example of these upgrades. Notice: Undefined index: HTTP_REFERER in /home/forge/newleafbiofuel. Manipulating data from datagrid, datatables, Using Current RowIndex I have a vb. This software was originally released on 23rd September, 2012. The childNodes list includes all child nodes, regardless of what their name or type is. and i requery. These are dplyr and data. For this we will be using Microsoft. While DataSet can be used to represent a database as a whole, a DataTable object can be used to represent a table in the Database/DataSet. Understanding DataTables. Start studying Lesson 3 - Data Manipulation. add() method of Put class. As the name suggests, the package is closely related to R's data. For remote data source, the new record will be send along with the request to. Databricks, founded by the team that originally created Apache Spark, is glad to share this eBook, in which we cover:. zip Download. Consider sample data below. Some of dplyr's key data manipulation functions are summarized in the following table:. Our software and services protect against more risks at more points, more completely and efficiently, enabling confidence wherever information is used or stored. Angular2 datatable for handling large and complex datasets in table format. This is a Python package for manipulating 2-dimensional tabular data structures (aka data frames). You need to assign columns from your data to columns of the DataTable. Scatterplots and line charts with D3. Working with rows is a fundamental part of DataTables, and you want to be able to easily select the rows that you want from the table. Filtering Data. It has all the features you would expect from any other datatable but in a light package with no external dependencies. DataTables provides callback functions to manipulate header and footer HTML data and add value to the presentation. Scatterplots and line charts with D3. The datatable. ItemTable) [edit | edit source] The old way of modding a DataTable would be to edit the DataTable directly, and applying the changes you wanted directly to the asset. DataTable - Adding, Modifying, Deleting, Filtering, Sorting rows & Reading/Writing from/to Xml In this article, I am going to explain how to Add, Modify, Delete, Sort, Filter rows of the DataTable and also loading data from xml and writing data into xm. Business use case. NET programming. render DT has a wide array of options available to it for rendering different types of data orthogonally (ordering, searching, display etc), but it can be used very simply to manipulate the content of a cell, as shown here. 10 a new Data Table Source View API is available that lets you read information on the different operations and transformations that are performed to construct a data table in an analysis, what is referred to as the data table source view. Now let's apply the DataTables to our plain HTML table and see the reaction of that. WP Jquery Data table plugin can help the WordPress website owner to insert table anywhere for displaying any information in tabular form, which will also have some cool features like option of selecting no. Set data event, fired when the data is gathered from the form to be used to update the DataTable. * @returns {object} Object with two parameters: `data` the data read, in * document order, and `cells` and array of nodes (they can be useful to the * caller, so rather than needing a second traversal to get them, just return. There are two ways to create a DataTable: by using the Fill() method of the DataAdapter class and by building the DataTable programmatically. Exploring Secrets of the. rows attribute in the dataTable used for displaying the number of rows in each page. Modding DataTables (e. CSV data manipulation You are encouraged to solve this task according to the task description, using any language you may know. Manipulate tables in existing PDF One of the earliest features supported by Aspose. You can create static tables in DAX using the DATATABLE function. The datatable. Excel and DataTables Automation: Workbooks are references to Excel files, regardless of the data, format and layout they contain. They can be found in the **Browse and Select a. 9 and earlier for reference only. In this chapter we will learn how to make great use of Wicket‘s DataTable components to make displaying awesome tables a snap. DataCamp’s data. I have situations that can be defined by end. The basic set of R tools can accomplish many data table queries, but the syntax can be overwhelming and verbose. How to create DataSet without Databse Dataset represents a collection of data retrieved from the Data Source. This site contains the legacy documentation for DataTables v1. The dataPaginator component works in conjunction with the dataTable component allowing manipulation of the view of the dataTable data model. An element's data-* attributes are retrieved the first time the data() method is invoked upon it, and then are no longer accessed or mutated (all values are stored internally by jQuery). The course concludes with fast methods of importing and exporting tabular text data such as CSV files. With LINQ queries we can query different data sources such as XML. Data namespace (System. Exporting data to Excel helps in visualizing the data in a more understandable fashion. Learn more about DATATABLE in the following articles: Create Static Tables in DAX Using the DATATABLE Function. Columns Configuration. It makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a multitude of browsers. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: