SQL Server

SQL Statement usage Specification specification content and precautions:1, the query time using the top 10/top and where sentence control each execution of SQL returned result collection, Return the smallest results while meeting business needs. 2,

1 withQs as(2 SelectCp.objtype asObject_type,/*type*/3 db_name(st.dbid) as [Database],/*Database*/4Object_schema_name (St.objectid,st.dbid) as [Schema],/*Architecture*/5 object_name(st.objectid,st.dbid) as [Object],/*Object Name*/6

Recently saw too many people ask this kind of question oneself also do not know very much to learn on the net study oneself testCREATE TABLE test0621 (ID INT,NAME NVARCHAR (max))INSERT test0621 VALUES (1, ' AA '), (1, ' BB '), (1, ' CC ')INSERT test0

1. Empty all table data in SQL Server database(1) Write the stored procedure script:CREATE PROCEDURE Sp_deletealldata asEXECsp_msforeachtable ' ALTER TABLE? NOCHECK CONSTRAINT All 'EXEC sp_msforeachtable ' ALTER TABLE? DISABLE TRIGGER All

-- table insertval updatevalif  (object_id (' Data_sync_fh_dj ', ' TR ')  is not  NULL)     drop trigger data_sync_fh_djgocreate trigger data_sync_fh_ djon fh_dj    for insert,update,deleteas    declare       @oldUpdate  varchar,     @newDate

Example Stuff FOR XML Path Reference articles ExampleThere was a problem with SQL Server yesterday: I had to write a stored procedure to process the data in several tables, and finally the problem was that I wanted to stitch up the

1 Nocount OptionsWhen SET NOCOUNT is on, no count is returned.When SET NOCOUNT is OFF, the count is returned.egif object_id(N'table_test'N'U') is not NULLDrop Tabletable_testGoCREATE TABLETable_test (IDINT, nameVARCHAR( -))GoINSERT

form of SQL Server data store Before you talk about several different ways of reading, the first thing to understand is how SQL Server data is stored. The smallest unit of SQL Server storage is pages (page). Each page size is 8k,sql server

In SQL Server, the view is a saved T-SQL query. The view definition is saved by SQL Server so that it can be used as a virtual table to simplify the query and add another layer of security to the base table. However, it does not occupy any space in

Run the SQL installationClick Install-New SQL Server Standalone installation, if we have a failover cluster ready, then we can create a failover cluster SQLGeneral CheckA laugh.Select version, or enter the key to automatically identify the

The @ @ROWCOUNT in SQL Server returns the number of rows affected by the previous statement, and the return value type is int integer. ROWCOUNT_BIG.">if the number of rows is greater than 2 billion, you need to use Rowcount_big. The values of the @ @

Using system;using system.collections.generic;using system.linq;using system.text;using System.Configuration;using System.data.sqlclient;using system.data;namespace myhelper{//non-public, only DAL private reference;//encapsulation Execute SQL Server

1. Create a stored procedure that returns a result setCreate procedure Firstpro as begin Select * from dbo. personEnd execution:execute Dbo.firstproView CodeSuch as:2. Create a stored procedure that requires input of an input parameterCreate

In simple terms, the difference between update and alter, such asRight-click PropertiesUpdate Everymatchinfo SET matchno=111--Updating permissionsALTER TABLE EVERYMATCHINFO add IDD INT--Change permissionsThe actual is the difference between DDL and

Write a batch update code, in order to facilitate the search, sent up1 classDBHelper2 {3 //Operation Profile4Configuration config =configurationmanager.openexeconfiguration (configurationuserlevel.none);5 //first fetch once, as

An orphaned account is a database in which the account has only a user name and no login, so that the user exists in the sysusers system table in the user library and there is no corresponding record in the syslogins of the master database.Orphaned

REPLACEReplaces all occurrences of the second given string expression in the first string expression with a third expression.GrammarREPLACE (' String_replace1 ', ' string_replace2 ', ' string_replace3 ')Parameters"' String_replace1 'The string

Some Suggestions on setting null in SQL server: sqlnull When designing a table, we sometimes argue about whether the field allows Null values. The database master Kalen Delaney gave the following suggestions: 1. Never allow NULL values in the User

SQL Server mobile system database, SQL Server When it comes to this problem, someone will think of three questions: 1. What is system data? 2. Why do we need a mobile system database? 3. We can use attaching and separating mobile system databases.

SQL Server timestamp functions and Usage Details, SQL Server This example describes the SQL Server timestamp function and usage. We will share this with you for your reference. The details are as follows: I have always been vague about the concept