sql query to linq converter online

Part of this article is organized from MSDN First, the Concept of LINQ: LINQ is the abbreviation for Language Integrated query (language integration queries), which is integrated in the. NET programming language, which makes query expressions good at compile-time syntax checking, rich metadata, IntelliSense, and othe

Tags: style blog color ar for strong SP div on1. Query all fieldsusing New Northwindcontext ()) { var expr = context. Products; foreach (var in expr) { Console.WriteLine (item. ProductName);} }SELECT [Extent1].[ProductID] as [ProductID], [Extent1].[CategoryID] as [CategoryID], [Extent1].[ProductName] as [ProductName], [Extent1].[UnitPrice] as [UnitPrice], [Extent1].[discontinued] as [discontinued] from

Label: = new Northwindcontext ()) { var= context. Products; foreach (var in expr) { Console.WriteLine (item. ProductName); } } SELECT [Extent1].[ProductID] as [ProductID], [Extent1].[CategoryID] as [CategoryID], [Extent1].[ProductName] as [ProductName], [Extent1].[UnitPrice] as [UnitPrice], [Extent1].[discontinued] as [discontinued] from [dbo].[Product] as [Extent1] 2. Querying a specified field var = context. Products . Select =

Directory [10 days to learn about Linq to SQL] day 1-Basic Knowledge [10 days to learn about Linq to SQL] The next day -- data context [10 days to learn about Linq to SQL] The third day -- Data

Label:Recently doing projects using LINQ in conjunction with EntityFramework to handle database operations. Want to also use for almost a year, found that some use of skills is necessary to pay attention to, special to do under the summary, I hope that the new friends are helpful. At the beginning of the use of the total loop query subquery, the results of poor performance is not good, now look at all feel

3 courses. SelectAVG (degree) fromScorewhereCNO like'3%'GROUP BY Cno have Count (*) >=5Linq: fromSinchScoreswhereS.cno. StartsWith ("3") group S by s.cno into CCwhereCc. Count () >=5 SelectCc. Average (c =C.degree) Lambda:Scores.Where (S= = S.cno. StartsWith ("3") ) . GroupBy (S=s.cno). Where (CC= = (CC. Count () >=5) ) . Select (CC= CC. Average (c =C.degree)) Linq:sqlmethod like can also write: S.cno. StartsWith ("3") or Sqlmethods.like (S.cno,"%3") 14. Mult

") View Code 12. Grouping example Code queries the average score of at least 5 students in the score table and 3 courses. SelectAVG (degree) fromScorewhereCNO like'3%'GROUP BY Cno have Count (*) >=5Linq: fromSinchScoreswhereS.cno. StartsWith ("3") group S by s.cno into CCwhereCc. Count () >=5 SelectCc. Average (c =C.degree) Lambda:Scores.Where (S= = S.cno. StartsWith ("3") ) . GroupBy (S=s.cno). Where (CC= = (CC. Count () >=5) ) . Select (CC= CC. Average (c =C

may also think about this. Add a filter condition "Nothing more" to add a parameter to the interface, a parameter to the stored procedure, and a condition to the WHERE clause ,...... Working hard. The customer's filtering condition is as follows: since the order contains the "country" field, you want to filter the condition according to the country, and you can select multiple countries, for example: The engineer may fall down when he sees the figure ...... The above can be used as a j

This document uses the customers and orders tables in the northwind database as examples to illustrate how to query and add a table in the LINQ to SQL statement. First, create datacontext and the corresponding entity class through the LINQ to SQL file wizard. If you do not k

filter condition "Nothing more" to add a parameter to the interface, a parameter to the stored procedure, and a condition to the WHERE clause ,...... Working hard. The customer's filtering condition is as follows: since the order contains the "country" field, you want to filter the condition according to the country, and you can select multiple countries, for example: The engineer may fall down when he sees the figure ...... The above can be used as a joke, but in other words, there is no uni

LINQ to SQL can query SQL-based data quickly, including the basic object/relation mapper directly in VS, and the O/R mapper can quickly map SQL-based data sources to CLR objects and then use LINQ queries. In the project, right-cli

Just a little bit of Linq was attracted by it, and I suddenly came up with the idea of learning and using it in one breath. So I posted a video on the ASP. NET official website. I am not very good at English, but I can understand how to use it. Below I wrote a little bit of fur I learned. It is a learning record. First, I use Visual Studio 2008 development tools and SQL Server data sources, which are writte

Linq to SQL: Second of integrated database language query Step 5: Create Your Object Model1. Open the Data Connections Tree View2. Expand the Northwind folder3. Expand the Tables folder4. Double-click solution explorer to open the Northwind. dbml file.5. Drag the MERs table from the table folder to the Linq to

,sc.degree from course as c,score as SC where c.cno = sc.cnolinq: From C in Courses J Oin SC in Scores on c.cno equals SC. CNO Select New { sc. Sno,c.cname,sc. Degree }lambda: courses.join (Scores, C = c.cno, sc = sc. CNO, (c, sc) = = new { SNO = sc. SNO, CNAME = c.cname,

LINQ to SQL null Query More than once in the Forum, some netizens asked questions about the query of LINQ null. Here we take the Microsoft northwind database as an example to summarize: For example, how can I implement an SQL sta

")) . GroupBy (s = s.cno) . Where (cc = (cc. Count () >= 5)) . Select (cc = CC. Average (c = c.degree))Linq:sqlmethodIt can also be written like this:17 13. Grouping 1 Check the average score of the course with at least 5 students enrolled in the score table and begin with 3.2 Select AVG (degree) from score where CNO like ' 3% ' GROUP by CNO have Count (*) >=53 Linq:4 from s in Scores5 w

Label:In the data query, often encountered the need to dynamically build query conditions. Using LINQ to implement this requirement may be more cumbersome than stitching up SQL statements in the past. This article describes 3 ways to dynamically build query conditions at run

Original address: Http://msdn.microsoft.com/zh-cn/dd567295.aspxIn the data query, often encountered the need to dynamically build query conditions. Using LINQ to implement this requirement may be more cumbersome than stitching up SQL statements in the past. This article describes 3 ways to dynamically build