SQL 常用判断语句

判断视图是否存在

IF object_id('viewname') IS not NULLbegin --操作 --drop view viewnameend

判断表是否存在

IF object_id('tablename') IS NULLBEGIN --操作END

判断列是否存在

IF NOT EXISTS (SELECT 1 FROM dbo.syscolumns WHERE [name]='columnname' AND id=object_id('tablename'))begin --操作end

判断函数是否存在

 

IF exists (select 1 from sysobjects where xtype='fn' and name='funcname')BEGIN --drop function funcnameend

 

判断存储过程是否存在

IF exists (select 1 from sysobjects where xtype='p' and name='procname')BEGIN --drop proc procnameend

 

判断触发器是存在

IF exists (select * from sysobjects where id=object_id(N'tr_es_Order_upd') and objectproperty(id,N'IsTrigger')=1) begin--DROP TRIGGER  tr_es_Order_upd ;end

判断索引是否存在 创建索引

IF NOT EXISTS (select 1 from sys.indexes where name='index_cb_WarehouseInOutDtl_MaterialsGUID')begin--操作END