SQL Server

A stored procedure in Transact-SQL, very similar to a method in the C # language, can be called repeatedly. After the stored procedure executes once, the statement can be cached so that the statements in the cache are used directly at the next

Briefly:In the query statement contains another query statement, the contained query is called a subquery, the query containing the subquery is called the parent query.In summary, a subquery is one or more query statements nested within a query

Cast (expression as data_type (length))Convert (data_type (length), expression, style) // If lengthis not specified, the default is 30 characters. data_type (length) Specifies the target data type (with optional lengths). The data_to_be_converted

1, the establishment of stored procedures, the function is to dynamically write information in the file, can be called in a trigger or stored procedure.SETAnsi_nulls onGOSETQuoted_identifier onGOCreateproc [dbo].[Sp_sendmagtofile]( @path varchar( -)

Keywords: SQL Server, table data, build INSERT statementFeedback please contact: [Email protected]Brief introductionDatabase data generates an INSERT (MSSQL version), which generates an INSERT or update SQL script for the data in the table. For

SQL Server failed to create a maintenance plan. Error code: c001f011.Failed to create instance from IClassFactory for COM component with CLSID {17bca6e8-a95d-497e-b2f9-af6aa475916f} because the following error occurred: c001f011.

I. INCLUDE of nonclustered indexesA nonclustered index can actually be seen as an IE with a list of clustered indexes, and when the clustered index contains all the information needed for the query, it is no longer necessary to check the base table,

--parameter-free stored procedure creation and invocation--Create stored procedure USP_TESTUSERGOIF exists (SELECT * from sysobjects where name= ' usp_test ') drop proc usp_testgocreate proc Usp_ Testasselect * from testgo--Execute stored procedure

1. Create a new database TestDB2. Create a new table for the TestDB database userinfoCreate a table named UserInfo, including the above fields, where the ID is the primary key and set the identity specification, Nation set the default value

Transferred from: http://www.cnblogs.com/hoojo/archive/2011/07/18/2109291.htmlØ Index1. What is an indexAn index is a list of data in a data table and a corresponding storage location that can be used to increase the speed of finding data in a table

We know that in SQL Server you can assign a value to a variable using a SELECT statement, such as the following statement to assign a variable @id of type int1 Declare @id int=-1;2 3 Select @id=Id from 4 (5 Select 1 asID6 Union All 7 Select 2

2. T-SQL query statement detailed transaction and lockDesigner: YangwenAnti-counterfeiting code: Thousands of million waves, although hard, blowing yellow sand began to goldSQL Server supports transactional mechanisms to ensure consistency of data.65

A view is a virtual table whose contents are defined by a query. As with a real table, a view contains a series of column and row data with names. However, the view does not exist in the database as a stored set of data values. Row and column data

Many-to-many relationships must be added with a separate table to represent--Class CREATE TABLE Banji (banji_id int constraint Pk_banji primary key, --primary key banji_num int not null,banji_name nvarchar (2 0)--Teacher CREATE TABLE Jiaoshi

In the normal development process, in the design of data, often encountered the problem of data type selection, in order to faster, more appropriate to choose the correct data type, so here is a summary. Classification SQL

Method 1:CREATE TABLE #tabTmp (id int)INSERT #tabTmp EXECUTE (' SELECT ID from ' [email protected])DECLARE curone cursor FORSELECT ID from #tabTmpOpen CuroneFETCH NEXT from Curone to @ID Method 2EXEC ('DECLARE curone cursor GlobalFor ' + @aSql)

Modify, add, or delete fields using SQL Replace statements in batches. SQL replacement statement. You can use this command to replace the content of a field in the whole batch, or add or remove characters to or from the original field content in

Mysql is compatible with the SQL statement Groupby, mysqlgroupby First, create the database hncu and create the stud table. Add data: Create table stud (sno varchar (30) not null primary key, sname varchar (30) not null, age int, saddress varchar (30

It is so easy to separate and attach SQL Server databases !, Sqlserver I. Overview SQL Server provides backup and recovery methods for "detach/Attach" databases, "backup/restore" databases, and duplicate databases. This section describes a commonly

SQL Server trigger and transaction usage example, server trigger This example describes SQL Server triggers and transaction usage. We will share this with you for your reference. The details are as follows: Add and delete triggers alter trigger