altertablemyTableaddmyNewColumnintnull; while1=1beginupdatetop (100000) myTablesetmyNewColumn=myOldColumnwheremyNewColumnisnull; if @@ROWCOUNT=0break;endaltertablemyTabledropcolumnmyOldColumn;EXECsp_RENAME'[myTable].[myNewColumn]','myOldColumn','COLUMN'
Applies to:SQL Server (Starting with SQL Server 2016 (13.x) SP2 CU16, SQL Server 2017 (14.x) CU24, and SQL Server 2019 (15.x) CU11), Azure SQL Database, and Azure SQL Managed Instance Optional parameter that forces a seek operation to be used to access thetable_name. In some ...
Transact-SQL Syntax Conventions Syntax CHANGETABLE ( { CHANGES table , last_sync_version | VERSION table , <primary_key_values> } ) [AS] table_alias [ ( column_alias [ ,...n ] ) <primary_key_values> ::= ( column_name [ , ...n ] ) , ( value [ , ...n ] ) ...
Microsoft.SqlServer.TransactSql.ScriptDom AbortAfterWaitType AcceleratedDatabaseRecoveryDatabaseOption AddAlterFullTextIndexAction AddFileSpec AddMemberAlterRoleAction AddSearchPropertyListAction AddSensitivityClassificationStatement AddSignatureStatement AdHocDataSource AdHocTableReference ...
sql语句中altertablemodify和altertablechange的区别...SQL语句中ALTERTABLE命令是数据库管理的重要组成部分，用于修改表的定义结构，包括添加、删除或修改列。在SQL的实际应用中，ALTERTABLEMODIFY和ALTERTABLECHANGE是两个常见的子命令，它们在MySQL等数据库系统中使用频繁，但存在显著区别。理解这些区别对于数据库管理员和...
Removes rows from the change table in the current database based on the specified @low_water_mark value.
SQL query to change the column type in SQL Server database We can useALTER TABLE ALTER COLUMNstatement to change the column type of the table. The syntax to change the column type is following: 1 ALTERTABLE[tbl_name]ALTERCOLUMN[col_name_1][DATA_TYPE] ...
Alter Database RDCC set change_tracking = on (change_retention = 2 days, auto_cleanup = on); 数据库修改跟踪权限开启了,不是所有表的跟踪权限都开启了,每个表还必须单独开启。 2.首先我们建一个简单的表然后插入几条记录。 Create table Employee ...
Column nameData typeDescription object_id int ID of the change table. Is unique within a database. version int Identified for informational purposes only. Not supported. Future compatibility is not guaranteed. For SQL Server 2012 (11.x), this column always returns 0. source_object_id int ID...
Return Type Remarks Examples See Also Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Returns a version that is associated with the last committed transaction. This version can be used when you enumerate changes by usingCHANGETABLE. ...