SQL server触发器中 update insert delete 分别给写个例子被

Posted 2021-03-11 【麦麦提敏】

INSERT:

 表1 (ID,NAME)
 表2 (ID,NAME)
 当用户插入表1数据后，表2也被插入相同的数据

CREATE TRIGGER TRI1
ON 表1
FOR INSERT
AS
BEGIN 
    INSERT INTO 表2 SELECT * FROM INSERTED
END
GO

 

DELETE:

表1 (ID,NAME)
表2 (ID,AGE,GENDER)
当用户删除表1某条ID的数据后，表2相应ID的数据也被删除

CREATE TRIGGER TRI2 ON 表1
FOR DELETE
AS
BEGIN 
    DECLARE @id INT
    SELECT @id FROM DELETED   
    
    DELETE 表2 
    WHERE ID = @id

END

GO

 

UPDATE:

表1 (ID,NAME)
表2 (ID,NAME)
当用户更改表1 NAME列数据后，表2相应ID的数据也同时更新

CREATE TRIGGER TRI3
ON 表1
FOR UPDATE
AS
IF UPDATE(NAME)
BEGIN
    UPDATE 表2
    SET A.NAME =  B.NAME
    FROM 表2 A, INSERTED B
    WHERE A.ID = B.ID
END
GO