Question

建立一个触发器，当表执行insert 操作时，进行下面操作，当执行update时，进行另一种操作。求例子

Answer 1

DECLARE
@IsInsert bit,
@IsUpdate bit,
@IsDelete bitIF EXISTS(SELECT 1 FROM inserted) AND NOT EXISTS(SELECT 1 FROM deleted)
SET @IsInsert = 1
ELSE
SET @IsInsert = 0IF EXISTS(SELECT 1 FROM inserted) AND EXISTS(SELECT 1 FROM deleted)
SET @IsUpdate = 1
ELSE
SET @IsUpdate = 0IF NOT EXISTS(SELECT 1 FROM inserted) AND EXISTS(SELECT 1 FROM deleted)
SET @IsDelete = 1
ELSE
SET @IsDelete = 0
create trigger Update_Del on Table
for update,delete
as
if not exists(select 1 from inserted)
begin /*inserted表无记录，是删除*/
end
else
begin /*是更新*/ end
go