Linq Group By Order By Multiple Columns

In this page, we are going to discuss the usage of GROUP BY and ORDER BY along with the SQL COUNT() function. GROUP BY for Several Columns: 34. ORDER BY is the SQL command used to sort rows as they are returned from a SELECT query. Here's a simple example to show you how to GroupBy Multiple Values using LINQ. (Category column is 5 columns right of “Amazon Status”). To group a collection you need to use : this. Product_Id = Products. Loop through Master-Detail Records using LINQ - Here’s an example of how to loop through Master-Detail Records using LINQ. I used String. The rows in Fig. NET, JavaScript, and C++. If we group by using the SQL clause we get the flat record set. 1 are displayed in order by primary key. Net, LINQ, DataTable, DataSet. The above example will copy all of the information from Table1 into Table2. Though this question is asking about group by class properties, if you want to group by multiple columns against a ADO object (like a DataTable), you have to assign your "new" items to variables:. It's an awesome little library that allows you to dynamically generate LINQ expressions from strings, which is perfect for things like sorting collections by object property names passed as querystring parameters to web api controllers, it even allows you to sort by child object. We are going to offer examples with character, numeric and date based columns. In Below Image link is a datatable and with rows highlighted in blue border needs to be concatenate , as we can see the Project Ids are same but present at different levels in datatable How to concatenate these 2 levels and aggregate it or bring the down 2 rows and append it with above rows with same project ID. The method is challenging to use, as it receives three different Func implementations. NET Forums / Data Access / ADO. LINQ Order By Examples in C# The order by clause in LINQ is easy to learn due to its close resemblance to the T-SQL syntax. You can specify more than one Grouping information for a single collection. LINQ Query to Group by Multiple and Order. in the LIMIT clause). NET Web API https://www. A few days ago I had a small issue concerning sorting. This object contains employee data. An ORDER BY clause allows you to specify the order in which rows appear in the ResultSet. If we wanted to order by the minimum, then by the second minimum, then by the third minimum we can use nested queries to select each of those values in different columns and order by them. Net, LINQ, DataTable, DataSet. I'm a big fan of LINQ, and one of my favorite extension methods is GroupBy. Before we use Group By with multiple columns, let’s start with something simpler. We will also provide some examples on combinations of these columns and. Fetching the Grouped Rows in LINQDatasource control. C# Linq Group By on multiple columns. c# multiple LINQ query on a DataTable select rows from datatable using linq c# (17) I'm trying to perform a LINQ query on a DataTable object and bizarrely I am finding that performing such queries on DataTables is not straightforward. How To Use Group By in LINQ to SQL. Gallery items can be null (it is coming through a service so I am unable to change this). GROUP BY can group by one or more columns. Using non-lambda, query-syntax LINQ, you can do this: var movies = from row in _db. Contrary to those, LINQ for CRM support ordering by “order by” clause. Sum is extension method from System. We assume a locally configured SQL Srever database server with the database MyDatabase populated as shown on this page. As you can see from the screenshot, this works perfectly well - the list is sorted by age, instead of being in the same order as the items were added. In this post we will investigate this question and try to answer it in a didatic way, so we can refer to this post in the future. 1) - Linq group by order by count issue; c# - Linq - 按ID值排序. Multiple "order by" in LINQ(转载)的更多相关文章. I have taken the example of one Department containing multiple Employees. Quantity) as OrderQuantity from OrderLines inner join Products on OrderLines. orderData option to specify a multiple column order by default (for example [ 0, 1 ]). In this page, we are going to discuss the usage of GROUP BY and ORDER BY along with the SQL COUNT() function. Specify multiple grouping columns in the GROUP BY clause to nest groups. Quantity) as OrderQuantity from OrderLines inner join Products on OrderLines. I have a component one grid which could be grouped by multiple columns and each group could be ordered ascending or descending. Today, I was required to order a list of records based on a Name and then ID. i have got a list of objects that have properties:. I can think of a way to do it with a specified number of subsequent rows to sort by. There are two simple, yet great, LINQ extension methods you may or may not know about, but that can really simplify the task of converting collection queries into collections: ToDictionary() and ToList(). LINQ is the best way to do further data manipulation operations (like searching, filtering, sorting) on Dataset in an efficient way. In this article we will delete multiple rows of a database table. Linq; namespace AbundantCode { internal class Program { //How to Merge two lists using LINQ's […]. linq中order by 和group by (含lambda表达式实现)以及综合案例的更多相关文章. 3, “MySQL Handling of GROUP BY”. Id where OrderLines. A Left outer join is a join in which each element of the first collection is returned, regardless of whether it has any correlated elements in the second collection. The examples in this topic demonstrate how to use the OrderBy, OrderByDescending, Reverse, and ThenByDescending methods to query a DataSet and order the results using the query expression syntax. It only supports 'Order By' clause with 'ascending' and 'descending' sorting direction. I want to take this thought a step further, and as implied by the post title, do a group by. The "using System. one use is. I have a component one grid which could be grouped by multiple columns and each group could be ordered ascending or descending. ) are performed on the database server side. Specify multiple grouping columns in the GROUP BY clause to nest groups. The LINQ Project C# VB Others…. Highest Value in each Group using LINQ - In this post, I will show you how to fetch the maximum value in each Group using LINQ. The ordering of the groups themselves are non-deterministic as per SQL behavior. Next drag the OrderDetails listed under Order onto the form to drop down a DataGridView. But: GroupJoin can be helpful when you need to create a grouped collection and do not want to write imperative code. The first OrderBy function of the list is the main sort. 4) “query” object is an IEnumerable collection. Hi, I read a DBF file (with more than 1. NET? I believe that multiple column Group By on the raw detail data is one of the most important query for reports and user output analysis, because only in the raw detail data you can sum, count and calculate transactional information based on a certain header information. I have a table that has the following 3 columns, ID, ShortCode, UploadDate. CategoryID, p. In this example, the first key value is the first letter of the student's last name. Contains(T t)will be supported in EF in. IEnumerable. NET MVC Grid View extension supports a specific binding mode designed to efficiently work with large datasets. Highest Value in each Group using LINQ - In this post, I will show you how to fetch the maximum value in each Group using LINQ. In this example we will show you, How to. I have a component one grid which could be grouped by multiple columns and each group could be ordered ascending or descending. Net, LINQ, DataTable, DataSet. DISTINCT for multiple columns is not supported. The table has 40+ columns consisting of invoice details. Ordering By a Column Name. Net two decades ago. Grouping and Joining Data - examines the standard query operators and query syntax used to group and join data. Side note: In the nested group-by, notice that LINQ to SQL uses multiple queries. The use case was pretty typical - aggregate some pre-filtered set of invoices by the product sold, count how many sales were there for each product, order the data by total sales value and take. Sanjay Vyas 2. linq lambda group by multiple Here is an example of how you can use group by multiple columns in linq lambda expression // Way 1 var students = from s in studentsStream group s by new { s. The default sort order is ascending. UPDATED: added a new column combining the Date and Time column which are string fields into DateTimeCombined column which is a DateTime field. Group by Multiple Columns using Anonymous Types in LINQ to SQL Posted on 30/06/2009 by Manoj I believe LINQ is a very nice advancement in creating database oriented applications as it allows us to separate application logic from the database. Quick tip today in case anyone runs into this. Group join in linq 10:22. This is made possible by LINQ providers as seen in Figure 1. Multiple “order by” in LINQ ; LINQ's Distinct() on a particular property ; Group By Multiple Columns ; What is the Java equivalent for LINQ? Using group by on multiple columns ; Select first row in each GROUP BY group? Why not inherit from List?. The movie table has three columns, ID, Name, and CategoryID. It is also possible to tell LINQ to SQL to 'just update all the fields', you do this with the Attach overload that takes a boolean second parameter. Dim result = (From n In numbers Order By n). Like and share. ";Order By" clause is used to sort the resulting rows in the order of specified column or colum. With GroupJoin, from the System. The GroupJoin operator performs the same task as Join operator except that GroupJoin returns a result in group based on specified group key. We have seen the Join operator in the previous section. c # using linq to group by multiple columns in a datatable. IEnumerable. For example, the home page shows a list of all articles from all categories. For each Id and Code, if message size exceeds column MAX size, then the message is split and stored in multiple rows using SequenceNumber in incremental form. NET classes. This part discusses how to query SQL database with the defined mapping classes. Put an end to those hundreds of Visual Studio Console projects cluttering your source folder and join the revolution of LINQPad scripters and incremental developers. Each same value on the specific column will be treated as an individual group. 2, I needed to use some aggregations in my database queries. Script How to combine multiple rows into one row by a same column value (SQL) This site uses cookies for analytics, personalized content and ads. Until then, using CASE expressions is my choice. Look how simple is write the follow SQL Query in LINQ C#: With SQL: select city from students group by city order by city Now in LINQ C#: from student in Students group student. Or at least all the data in the columns shown in the Order entity above. I have a SQL Server 2008 table with records in multiple groups comprised of composite group IDs (i. LINQ to SQL is a built-in O/RM (object relational mapping) framework that ships in the. Figure 1 - Different Flavors of LINQ There are multiple flavors of LINQ. order by a specific column and then a secondary column if the data in the first column is identical), through the columns. The sort order may or may not be ignored depending on the database file format, and in particular the schema format number. Postgres fully supports arrays as column types. If I have a set of the data of employee which has employee ID and if a group by the sql group by departmentid, anything else that is specific to the employee has to be aggregated somehow by using Sum, Min or Max , or may be aggregate. I am trying to convert the following into VB. Data is a local CSV file that is loaded into an ado. LINQ is a great tool for C# programmers letting you use familiar syntax with a variety of back-end systems without having to learn another language or paradigm for many query operations. In this article we will delete multiple rows of a database table. Can anyone here give me an example ordering by multiple columns using VB. Disclaimer: This site is started with intent to serve the ASP. 3, “MySQL Handling of GROUP BY”. Download code samples and examples for Windows 8, Microsoft Azure, Office, SharePoint, Silverlight and other products in C#, VB. Is this possible in Linq? If so what is the syntax, I've found for a single column groupby but can't see how to expand it. In order to group by multiple columns, the structure of our queries is basically the same as before. So now shall we see how to use the multiple where clause in a linq and lambda query. Net, LINQ, DataTable, DataSet. The GroupBy() function (which of course can be used from a LINQ expression as well as from the method syntax and I will show both) provides this functionality. GROUP BY dept; This statement will select the maximum salary for the people in each unique department. The same source code is the foundation for this compilation, but with all queries converted to Lambda-style LINQ queries. SQL ORDER BY Examples Problem: List all suppliers in alphabetical order SELECT CompanyName, ContactName, City, Country FROM Supplier ORDER BY CompanyName The default sort order is ascending, that is, low-high or a-z. Product_Id,Products. Grouping is a very powerful feature provided by LINQ that transforms a collection in groups where each group has a key associated with it. c) Adding new Constraints, Delete existing Constraints in the selected Table-Schema file and generate SQL scripts for this change. LINQ Group By With Multiple Properties? Jun 10, 2011. Gallery items can be null (it is coming through a service so I am unable to change this). net?? from d in dt. However, instead of grouping by one property, we need to create a new anonymous object and group by that object. Unpivoting is the process of normalizing data. order by multiple columns. Microsoft also designed LINQ to integrate closely with. 1, named Entity Framework 4. Though this question is asking about group by class properties, if you want to group by multiple columns against a ADO object (like a DataTable), you have to assign your "new" items to variables:. The default sort order is ascending. A byproduct of this operation is that the grouping tend to be sorted; however, this isn’t a guarantee. Loop through Master-Detail Records using LINQ - Here's an example of how to loop through Master-Detail Records using LINQ. 8 June 2013 / enumerable LINQ GroupBy Explanations and Examples. LINQ for CRM also supports lazy load, meaning that it allows you to specify number of records to take and number of records to skip. OrderBy (c => c. Gets sum of values from list of integer numbers. Calculate grand totals by using a query. Use the name column to place the rows in groups, but the summary functions operate on the. The same way, use ThenByDescending method to apply secondary sorting in descending order. Collections. So what the LINQ should do is group by name column and get the row for each name that has the earliest date+time. A GROUP BY clause can contain two or more columns—or, in other words, a grouping can consist of two or more columns. NET Forums / General ASP. A simple one, but I did spend some time on how to do it with Lambda Expression in How to order by multiple columns. c # using linq to group by multiple columns in a datatable. I have a SQL Server 2008 table with records in multiple groups comprised of composite group IDs (i. The AsEnumerable is an extension method on the DataTable that allows you to use Linq with it. 0 Feature Focus blog series. Sum data across multiple groups by using a crosstab query. If you notice the above result, all the customer names are concatenated in the order as they are stored in the table. You can use an order by clause in the select statement with distinct on multiple columns. LINQ by default does not support grouping over multiple columns for in-memory objects (datatable in this example), as we can do in SQL. and sum some variables I am using vb. It returns sum of numeric values in collection. Following is the basic syntax of GROUP BY clause. I stumbled across the Dynamic LINQ Library today and can't figure out why more people aren't talking about it. If you use a group function in a statement containing no GROUP BY clause, it is equivalent to grouping on all rows. in need to order by multiple columns and my first instinct was to use an && operator just like you do when. group by in datatable c# linq (5) LINQ - Group DataTable by multiple columns determined at runtime. Until then, using CASE expressions is my choice. have imported system. C# LINQ: Possible Multiple Enumeration of IEnumerable (Resharper). SupplierID } into g select new { g. Because ADO. StreamId select new { StreamId = g. Data; using System. 5 provides querying capabilities to Object Oriented programming languages like C# or VB. It only supports 'Order By' clause with 'ascending' and 'descending' sorting direction. SQL Inner Join and Group by Clause is described as follows, SQL -select Products. suleman sauadagar 3,772 views. Now with the LINQ you can join two entity on multiple columns by creating one anonymous type. The following 5 important LINQ query operators that belong to Ordering Operators category:-1. NET Language Integrated Query Standard LINQ To SQL LINQ To XML Query LINQ To Dataset Operators LINQ To Entities. Note: this functionality (numbering columns instead of using names) is supported by Mode, but not by every flavor of SQL, so if you're using another system or connected to certain types of databases, it may not work. Run a select query on the grouping variable (grouping variable will be of the type IEnumerable, in this case it will be IEnumerable), to select the columns needed. I have a LINQ function to get 3 things :: Line, Average of Duration and Count I have a problem to sort it based on Average Of Duration column. The ability to sort data based on specific criteria and then present the data to a client through a UI control is an important aspect of data binding. The low popularity can only be. Microsoft also designed LINQ to integrate closely with. I'm still trying to get my head around the whole "Lambda Expressions" thing. LINQ to SQL语句(6)之Group By/Having. A byproduct of this operation is that the grouping tend to be sorted; however, this isn't a guarantee. OrderLinesgroup Orders by Orders. Cláusulas Let, Group By e Order By no LINQ. The final method "ToList" is necessary to cast an enumerable list to a generic list. Linq; I can suggest that you try using manual load on demand in order to access the respective records when. The GroupJoin operator performs the same task as Join operator except that GroupJoin returns a result in group based on specified group key. However, instead of grouping by one property, we need to create a new anonymous object and group by that object. For each Id and Code, if message size exceeds column MAX size, then the message is split and stored in multiple rows using SequenceNumber in incremental form. People are not going to know what DTRow is for example. 多列(Multiple Columns) 语句描述:Linq使用Group By按CategoryID和SupplierID将产品分组。 说明:既按产品的分类,又按供应商分类。. Let's consider the three more common functions used. We can achieve the same in multiple ways such as writing multiple group by clause recursively for the various keys or by creating an in memory buckets to group programmatically. LINQ is a great tool for C# programmers letting you use familiar syntax with a variety of back-end systems without having to learn another language or paradigm for many query operations. Can anyone here give me an example ordering by multiple columns using VB. The simplest possible Hibernate query is of the form: from eg. In linq if we use orderby operator by default it will sort list of values in ascending order we don't need to add any ascending condition in query statement. With GroupJoin, from the System. We assume a locally configured SQL Srever database server with the database MyDatabase populated as shown on this page. Sum is extension method from System. Generic; using System. Gayani provides the complete source code for a sample Data Access Layer for LINQ to SQL, using the Northwind Database, and explains how it all works and how to get good performance. Here is an example: SQL Code: SELECT DISTINCT agent_code,ord_amount FROM orders WHERE agent_code='A002' ORDER BY ord_amount; Output:. NET Framework > Visual C#. I used String. The ORDER BY clause allows you to sort the result set of the specified SELECT statement by one or more columns and also provides the option of specifying an ascending or descending sort order for each column. c # using linq to group by multiple columns in a datatable. LINQ query syntax does not support OrderByDescending, ThenBy, ThenByDescending and Reverse. Key, g }; 语句描述:使用Group By按CategoryID和SupplierID将产品分组。. Id where OrderLines. NET Framework 3. Group By in Linq To Sql Here I create data context class object. When you reach at Country dropdown you get lots of County names to select. City by student. Score } into g orderby g. I am trying to convert the following into VB. It only supports 'Order By' clause with 'ascending' and 'descending' sorting direction. Re: Joins and Left Outer Joins in LINQ–Do you want groups with that? This site is excellent and so is how the subject matter was explained. Ordering data in LINQ Queries by more than one column In this post I am going to show how to do ordering when you require to order data by using the multiple columns. The COUNT function gives us informations about the number of results for each value of the column we chose to group by. LINQ Group By With Multiple Properties? Jun 10, 2011. The 3 query expressions use an orderby element, orderby element ascending, and orderby element descending syntax. What should I Group By and where do I call the Count function in LINQ query? LINQ - using Group By and Count. I use LINQ almost exclusively for querying databases because it's more productive. NET Elasticsearch LINQ Entity Framework C#. 在说LINQ之前必须先说说几个重要的C#语言特性 一:与LINQ有关的语言特性 1. 多列(Multiple Columns) var categories = from p in db. Starting, here is an order by % 2 giving us a list of. ) are performed on the database server side. This is not specific to either LINQ or. How do I convert this tSQL statement to LINQ using group by in a sub query T1. For example the requirement is like, we have a table called tblCategory (parent table) and another table tblBrands (child table) which stored the data as following:-. If you want to get your data grouped by some criteria and you want to have the complete entities loaded then you should use the LINQ query that I have posted in my previous. Using LINQ to group by multiple properties and sum. Multiple "order by" in LINQ I have two tables, movies and categories , and I get an ordered list by categoryID first and then by Name. 语句描述:根据产品的―ID分组,查询产品数量大于10的ID和产品数量。这个示例在Group By子句后使用Where子句查找所有至少有10种产品的类别。 说明:在翻译成SQL语句时,在最外层嵌套了Where条件。 4. Gallery items can be null (it is coming through a service so I am unable to change this). 多列(Multiple Columns) var categories = from p in db. Although we made some slight changes to dig into the XML, the operators inside the query expression remain the same. In this clause you can specify ORDER BY the column within brackets. AssayName. WebCategories. Run a select query on the grouping variable (grouping variable will be of the type IEnumerable, in this case it will be IEnumerable), to select the columns needed. There are two simple, yet great, LINQ extension methods you may or may not know about, but that can really simplify the task of converting collection queries into collections: ToDictionary() and ToList(). NET LINQ to dataset. 例如,假设我有一个包含多个项目的列表,其中包含以下内容结构体:FieldChar1 - character FieldChar2. code- var users = ( from t1 in _context. With LINQ now in the programmer's arsenal, querying different data sources requires only the knowledge of the LINQ keywords and methods that were added in. Grouping by sequence in LINQ. Back to Library DynamicQueryable Class. CategoryID, p. NET Web API https://www. In this article, I would like to share how joins work in LINQ. SQL join tables with group by and order by Last update on September 19 2019 10:37:27 (UTC/GMT +8 hours) In this page, we are going to discuss the usage of GROUP BY and ORDER BY clause within a join. This article presents a small utility class to sort an "IEnumerable" of objects on multiple fields by the field names provided at the run time using Linq. I used String. Dear Experts I would want to join multiple tables in a linq query and the group by variables from different tables using a LINQ. You can use an order by clause in the select statement with distinct on multiple columns. Generic; using System. Makes it easier to develop applications that query a data source by providing IntelliSense, compile-time syntax checking, and debugging support. NET? I believe that multiple column Group By on the raw detail data is one of the most important query for reports and user output analysis, because only in the raw detail data you can sum, count and calculate transactional information based on a certain header information. NET Framework 3. Until then, using CASE expressions is my choice. You can sum a column of numbers in a query by using a type of function called an aggregate function. You should really post more of the code when you are asking for help. Query Expression Syntax Examples: Ordering (LINQ to DataSet) 03/30/2017; 4 minutes to read +7; In this article. In this example, the first key value is the first letter of the student's last name. A LINQ to SQL query gets sent to the database only when the program needs to read data. On a per-column basis (i. Customizing the group header The above example was great for showing the basics of ListView grouping, but the look was a tad boring, so let's exploit the fact that WPF lets us define our own templates and spice things up. The ORDER BY clause sorts rows using columns or expressions from left to right. LINQ allows queries to be executed that include grouping. I have a query that I'm using to group the records. SQL ORDER BY Descending and ascending Command The results we get from a table we may have to display in an order. This article will build on the LINQ introduction and focus on LINQ to XML for unified data access of XML-based data. Calculate grand totals by using a query. The GroupJoin operator performs the same task as Join operator except that GroupJoin returns a result in group based on specified group key. In case you want to sort the result set by multiple columns, you use a comma (,) to separate columns. This post details how to group and sum on multiple properties using lambda expressions. This part discusses how to query SQL database with the defined mapping classes. I use LINQ to SQL to get all products from a DB table and sort them by two fields - IsFavorite (boolean) and AddedOn (datetime). A GROUP BY clause can contain two or more columns—or, in other words, a grouping can consist of two or more columns. When you reach at Country dropdown you get lots of County names to select. Linq" directive is present at the top. Though this question is asking about group by class properties, if you want to group by multiple columns against a ADO object (like a DataTable), you have to assign your "new" items to variables:. In my example I added a SalesRep and LotNumber aside from the Item and Date. In this example, I am grouping by Age and Sex to find the count of people who have the same age and sex. NET Entity Framework” in the Nov/Dec 2007 issue of CODE Magazine. Group By multiple Columns in DataTable in C# using LINQ We might came across few scenarios where combination of columns makes Primary key in the DataTable. Here is Simple Code for understanding Group By in LinQ. Here is an example: SQL Code: SELECT DISTINCT agent_code,ord_amount FROM orders WHERE agent_code='A002' ORDER BY ord_amount; Output:. We illustrate this with two examples. If it's not installed, you'll get the following exception: The 'Microsoft. If we group by using the SQL clause we get the flat record set. LINQ Group by with multiple properties in VB. Score, TotalCount = g. SupplierID } into g select new { g. 1 Update 1, was released on July 25, 2011. The GROUP BY clause can be used with the conjunction of SELECT query to make a group of rows based on the values of a specific column or expression. The following example shows how to create nested groups in a LINQ query expression. Entity Framework Group By Multiple Columns. GroupBy and LookUp are generation operators. Group Join Using LINQ in LINQ To Objects Using a group join you can get group wise data using LINQ. Using the group by statement with multiple columns is useful in many different situations - and it is best illustrated by an example. Key, g }; 语句描述:Linq使用Group By按CategoryID和SupplierID将产品分组。 说明:既按产品的分类,又按供应商分类。在by后面,new出来一个匿名类。. obout inc - ASP. This tutorial starts with a general overview of LINQ, and then teaches you how to implement GROUP BY as you would in SQL. Resharper's "Convert to LINQ Metohds chain" function was used to help with this conversion. Run a select query on the grouping variable (grouping variable will be of the type IEnumerable, in this case it will be IEnumerable), to select the columns needed. But in essence my goal was to accomplish the task without multiple subqueries, which drags down performance. testdate order by EqNum; add a grouping column which divides the. SQL join tables with group by and order by Last update on September 19 2019 10:37:27 (UTC/GMT +8 hours) In this page, we are going to discuss the usage of GROUP BY and ORDER BY clause within a join. I want to add the result of this. If you use a group function in a statement containing no GROUP BY clause, it is equivalent to grouping on all rows. [LINQ via C#] - [LINQ to Objects] This part discusses the usages of built-in LINQ to Objects query methods and query expressions. In this example, the first key value is the first letter of the student's last name. 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: