linqpad convert sql to linq

be negative interop_db.SubmitChanges (); nwindTxn. commit ();} catch (Exception e) {// if there is an error, all operations roll back the Console. writeLine (e. message);} nwindConn. close (); Statement Description: This example uses an existing ADO. NET connection to create a Northwind object, and then shares an ADO. NET transaction with this object. This transaction is used to execute SQL commands through the ADO. NET connection and submit changes

Here I recommend to you a linqpad with this tool and skilled use can quickly learn and master LINQInstallation steps:Using LINQPad, you can easily debug LINQ and lambda expressions. It comes with LINQ and the F # simple Getting Started tutorial, linqpad whether you like it o

LINQPad supports all functions of C # 3.0 and Framework 3.5: LINQ to SQL LINQ to Objects LINQ to XML LINQPad is also a good learning LINQ tool, containing 200 examples from the book

I learned about LINQ today and found a good tool. Linqpad !! The advantage of this tool is that you do not needProgramRun in, and use only tools for testing. ThenCodeYou can use it to make it fast, simple, and convenient. It can generate Lambda and SQL statements corresponding to its LINQ query. It is very c

During this time, writing of LINQ and SQL is missing! Or are you getting old? More and more will not change Problem: ========================================================== ======== VaR ret = from X in LSWhere (String. isnullorempty (Arg. querytext )? True:((X. ?? ""). Toupper (). Contains (Arg. querytext. toupper ())| (X. B ?? ""). Toupper (). Contains (Arg. querytext. toupper ())| (X. c ?? ""). Toupper

In one sentence, convert a Linq statement to an SQL statement.Zookeeper Public IEnumerable {IEnumerable IQueryable MerchantList = Report_List (); # Region obtain the VMB_Report set from MerchantList ResultModel = merchantList. Select (o => new VMB_Report{ MerchantID = o. MerchantID,MID = o. MID,DBA = o. DBA,DBAPhone = o. DBAPhone,ContactName = o. ContactName,Tota

Tags: com official situation--lis tween Outer page endOne: We may encounter two problems with LINQ: 1. When our LINQ performance is low, what if the optimization???? The SQL that we write for LINQ generates no control ... (To do performance optimization, you must know in advance what

To use Nhibernate for development, you must view and analyze the SQL statements generated by Nhibernate to view the SQL statements generated by Nhibernate. You can use NHProfiler and log4net. But NHProfiler is charged (of course, in tianchao, you know ......), Log4net configuration is troublesome. Today, I found a tool LinqPad when I checked the information about

address of the associated server is also populated here. Then we came to security: Choose to use this security context to establish a link, and then fill in your remote server's login username and password. Then we open the LINQ pad, here I am using LINQ pad 5, create a new link, always next, then to this interface: Select Include additional databases and the following screen will appear: Choose your ma

easy way to integrate data validation and business logic rules into your data model. LINQ to SQL fully supports transactions, views, and stored procedures. It also provides a convenient way to verify the set data and business logic rules in your data model. Modeling databases using LINQ to SQL: Create a database by us

= = 5); Prod1. UnitsInStock-= 3; ProD2. UnitsInStock-= 5;//This has an error and cannot be negativeinterop_db. SubmitChanges (); Nwindtxn.commit ();}Catch(ExceptionE) {//Suppose there is an error. Rollback of all operationsConsole. WriteLine (e.message);} Nwindconn.close ();Statement Description: This sample creates a Northwind object using a pre-existing ADO connection and then shares an ADO transaction with this object. This transaction is used both to run

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,

()){db.Log = Console.Out;db.Students.InsertOnSubmit(aStudent);db.SubmitChanges();}Console.WriteLine("----------End Add a student");} SQL statements for output 1234567 insert into [dbo].[ Student] ([ name ], [hometown]) values (@p0, @p1) select convert ( int ,scope_identity ()) as [value] --@ P0:input NVarChar (Size = 4000; Prec = 0; Scale = 0) [Zhang Xiao ii] --@p

Label:DataContextDataContext, as the main entry point for the LINQ to SQL framework, provides us with methods and properties that illustrate several typical applications of DataContext in several examples.Creating and Deleting databasesThe CreateDatabase method is used to create a database on the server.The DeleteDatabase method is used to delete the database identified by the DataContext connection string.

Http://u.115.com/file/f2f877c8d1 demo LINQ to SQL supports all the key functions that SQL developers expect. You can query information in a table, insert information in the table, and update and delete information in the table. SelectYou can select (Project) by writing a LINQ query in your own programming language and

linqproductdatacontext class inherits from system. Data. LINQ. datacontext. The datacontext class represents the main entry point of the LINQ to SQL framework and provides a series of database operation methods. (2) convert the poruduct table in the database to the seal class poruduct, and

data model class will match the data type of the database architecture. This means that compilation errors will occur if you try to specify a boolean value to decimal or implicitly convert the numeric type. If the column in the database can be null, the corresponding attribute created in the data model by using the LINQ to SQL designer will be of the Nullable ty

An error occurred while using LINQ to Entities today to facilitate the description of creating a demo table for restoring problems: CREATE TABLE Person(Id int Identity (1,1) primary key,Name nvarchar is not NULL,Age int NOT NULL)INSERT into person select ' Person1 ', 20INSERT into person select ' Person2 ', 30INSERT into person select ' Person3 ', 40 LINQ to Entities related programs: var context = new T

].[Customerid]Where[T1].[Customerid]=@ P0-- @ P0 = 'Bruce ', @ p1 = '2017-08-11' However, no matter method 2 or 3 is used, an exception is thrown, because neither of them can explain the statements generated by multi-Table Association:"Left Outer Join[DBO].[MERs]As[T1]On[T1].[Customerid]=[T0].[Customerid]" A friend named Terry aney solved this problem in the blog "batch updates and deletes with LINQ to SQL