SQLSERVER触发器触发INSERT,UPDATE,DELETE三种状态

发布时间：2020-12-12 13:34:19 所属栏目：MsSql教程来源：网络整理

导读：转自：http://yunlongzheng.blog.51cto.com/788996/780110 一个触发器内三种INSERT,UPDATE,DELETE状态 CREATE ? TRIGGER ? tr_T_A ? ON ? ? T_A ? for ? INSERT,DELETE ? ? ? ?? ??如IF ? exists ? (select ? * ? from ? inserted) ? and ? not ? exists ? (

转自：http://yunlongzheng.blog.51cto.com/788996/780110

一个触发器内三种INSERT,UPDATE,DELETE状态

CREATE ? TRIGGER ? tr_T_A ? ON ? ? T_A ? for ? INSERT,DELETE ? ? ? ?? ??如IF ? exists ? (select ? * ? from ? inserted) ? and ? not ? exists ? (select ? * ? from ? deleted) ? 则为 ? INSERT ?? ??如IF ? exists(select ? * ? from ? inserted ? ) ? and ? exists ? (select ? * ? from ? deleted) ? 则为 ? UPDATE ?? ??如IF ? exists ? (select ? * ? from ? deleted) ? and ? not ? exists ? (select ? * ? from ? inserted)则为 ? DELETE ?
插入操作（Insert）：Inserted表有数据，Deleted表无数据? 删除操作（Delete）：Inserted表无数据，Deleted表有数据? 更新操作（Update）：Inserted表有数据（新数据），Deleted表有数据（旧数据）? ? 笔者用到的案例:

create TRIGGER [risk].[Entry_Head_port_Exchange_Trigger]
   ON  [RiskH800].[risk].[ENTRY_HEAD]
   AFTER INSERT,UPDATE
AS 
DECLARE @COUNT INT
    DECLARE @MANUAL_NO_COUNT INT
    IF EXISTS (SELECT 1 FROM INSERTED)
       IF EXISTS(SELECT 1 FROM DELETED)
       BEGIN
       SELECT @COUNT = COUNT(*) FROM risk.ENTRY_HEAD_port_EXCHANGE WHERE ENTRY_ID = (select ENTRY_ID FROM DELETED)
       SELECT @MANUAL_NO_COUNT = COUNT(MANUAL_NO) FROM DELETED where substring(MANUAL_NO,1,1)= 'B' or substring(MANUAL_NO,1)='C'
           IF @COUNT <=0 AND @MANUAL_NO_COUNT>0
           INSERT INTO risk.ENTRY_HEAD_port_EXCHANGE(ENTRY_ID,CREATE_DATE)(SELECT ENTRY_ID,getdate() FROM DELETED)
       END
       ELSE
       BEGIN
       SELECT @COUNT = COUNT(*) FROM risk.ENTRY_HEAD_port_EXCHANGE WHERE ENTRY_ID = (select ENTRY_ID FROM INSERTED)
           SELECT @MANUAL_NO_COUNT = COUNT(MANUAL_NO) FROM INSERTED where substring(MANUAL_NO,getdate() FROM INSERTED)
       END

（编辑：李大同）

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