WHILE(exists (select 1 from @tablename)) BEGIN set @name=(select top 1 tablename from @tablename order by xorder desc ); SELECT @sql= 'delete from '+tablename+CHAR(13) FROM @tablename WHERE tablename=@name; select @sql; EXEC sp_ExecuteSQL @sql; IF @@Error <> 0 GOTO ErrM del...
在Sql中我们经常会用到in 普遍的写法为 where xx in ('1','2','3') 通过函数写法为: IF EXISTS ( SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[ArrayToTable]') AND type IN ( N'FN', N'IF', N'TF', N'FS', N'FT' ) ) DROP FUNCTION [dbo].[ArrayToTable] ...
In SQL Server, truncating a table is a fast way to clear out records from a table if you don't need to worry about rolling back. When a table is truncated, the row deletions are not logged which is why rolling back is not possible without a transaction (NOTE: you can rollback a tr...
Execute SQL task fail for Droping a table if exists? Execute SQL Task in Control Flow with a @StartDate and @EndDate DATETIME Parameters Execute SQL Task size limitation? Execute SQL Task using ADO.NET connection To execute a stored procedure with input parameters Execute SQL Task: Error Exec...
说明:SQL中加[IF EXISTS] ,可以防止因表不存在而导致执行报错。 参数:db_name:Database名称。如果未指定,将选择当前database。table_name:需要删除的Table名称。 3、示例 以下示例演示DROP命令的使用,依次执行如下SQL语句: --删除整个表course DROP TABLE IF EXISTS course ...
@Table varchar(250) ) as begin set nocount on declare @SQL varchar(1500) if exists ( select * from [dbo].[sysobjects] where [id] = object_id(@Tabl e) and objectproperty([id], N'IsUserTable') = 1 ) begin set @SQL = 'truncate table ' + @Table exec (@SQL) end set nocount ...
TRUNCATE TABLE [dbo].[tblDS2] /* Commands completed successfully. */ GO DROP TABLE IF EXISTS [dbo].[tblDS2] JasonO Old Hand Points: 323 More actions August 15, 2022 at 6:36 am #4076393 Like (0) Hi All, Thank you so much for your replies. Just to add on, does Mi...
代码语言:sql 复制 droptabletable_name;droptableifexiststable_name; 注意: drop会删除整个表,包括表结构和数据,释放空间 立即执行,执行速度最快 不可回滚 1.3 删除/清空表数据:delete sql命令 代码语言:sql 复制 #删除部分数据deletefromtb_namewhereclause;#清空表,仅删除数据、保留表结构,同时也不释放表空间de...
Truncate all tables in a SQL Server database Delete SQL Statement in SQL Server, Oracle and PostgreSQL SQL Drop Table Examples with T-SQL and SQL Server Management Studio SQL Server DROP TABLE IF EXISTS Examples About the author Aubrey Love is a self-taught DBA with more than six years of...
Here it is the associated T-SQL script, supposing you have 2 tables called MyTable and MyReferencedTable: -- Remove constraint IF EXISTS(SELECT 1 FROM sys.foreign_keys WHERE name = 'FK_MyReferencedTable_MyTable') BEGIN ALTER TABLE dbo.MyReferencedTable DROP CONSTRAINT FK_MyRef...