linq to mysql

This article serves as the basis for learning LINQ. All content comes from the learning materials of ms linq. As a component of. NET Framework Version 3.5, LINQ to SQL provides a runtime infrastructure for using relational data as object management. Language integration query (LINQ) is an innovative feature introduced

First article from cud, how to insert, modify, and delete data using LINQ to SQLPreparation, now the database is built in the test table student, the table has only three fields Id,name,hometown, where the ID is an int type of self-growing field, Name and Howmtown is the nvarchar type1. Open VS2010 new Console Application and add LINQ to SQL Class, named Dbapp.dbml, after creating a new dbml file, you can o

Funny LINQ Part2: Create a generic operation class for the LINQ database (below) The previous article introduced how to implement a general insert operation, that is, directly using utility. insert (XXX. Then, you may naturally think about whether you can implement General update, delete, and query operations. The answer is yes! Next let's extend the Dal mentioned in the previous article: Using system;

We previously wroteProgramWhen it comes to paging on the Database End, it is generally difficult to implement it. Especially for SQL 2000 databases, you need to write a bunch of SQL statements or write a stored procedure or something yourself. Now, if you use the LINQ query syntax in vs2008, it will become super simple for developers. At the course introduced by LINQ last Friday (November 20), we discusse

Label:There are currently two tables, Sgroup and Sgroupuser, which are associated by Gkey, while the Sgroup table records the group, and the Sgroupuser record is the user in the group, so there is no data in the Sgroupuser. You need to use the left join to get the data: The LINQ syntax is as follows: var sg = ( from the dc.sgroup in dc.sgroupuser on G.gkey equals Gu.gkey into L from in l.defaultifempty ()

Project Description $ LINQ is a javascript version of. Net's LINQ to objects, with some query operations stored red by morelinq (an extension to LINQ to objects ). What is $ LINQ? $ LINQ is an implementation. net LINQ to objects

Use LinQ to query data objects, and use linq to implement data objects. As a result of project requirements, I have come into contact with LinQ. After some time of study, I have a simple understanding of LinQ. This article will briefly describe this topic. First of all, we should write several questions to understand f

Atitit. GroupBy LINQ Implementation (1)-----LINQ Framework Selection java. net PHPImplementation methods have such as the following1. Dsl/java8 Streams AP, targeted query API, recommended 12. Linq::: DSL 1 for like SQL1.1. linq4j (JDK6 ok,jdk7 compilation error , horse jar download ) 11.2. Quaere: LINQon Java ( new sourcecode) 11.3. Josql is also API 2 similar

"; Sqlitecommand Command=Newsqlitecommand (SQL, m_dbconnection); Sqlitedatareader Reader=command. ExecuteReader (); while(reader. Read ()) {Console.WriteLine ("Name:"+ reader["name"] +"\tscore:"+ reader["score"]); } console.readline (); } }}usingModels;usingSystem;usingSystem.Collections.Generic;usingSystem.Data;usingSystem.Data.Linq;usingSystem.Data.Linq.Mapping;usingSystem.Data.SQLite;usingSystem.Linq;usingSystem.Text;namespacedemo2{ Public classSqlitedatacontext:datacont

[ProductID], [Extent1].[ProductID] as [ProductID1], [Extent1].[ProductName] as [ProductName] from [dbo].[Product] as [Extent1] UNION All SELECT [Extent2].[CategoryID] as [CategoryID], [Extent2].[CategoryID] as [CategoryID1], [Extent2].[CategoryName] as [CategoryName] from [dbo].[Category] as [Extent2]) as [UnionAll1]2. Unionvar expr = context. Products = p.productname) . Union ( context. Categories = c.categor

Label:Http://www.cnblogs.com/yukaizhao/archive/2010/05/13/linq_to_sql_1.htmlLINQ and LINQ to SQL are no longer a new thing, but I am in touch with the relatively late, in the spirit of knowing this matter to preach attitude, decided to write this series.The test environment that this article uses is vs 2010, and the SQL Server 2005 database.1. Starting with cud, how to insert, modify, and delete data using LINQ