CREATE OR REPLACE TRIGGER MESSAGEADD
BEFORE delete ON 表名
FOR EACH ROW
BEGIN
delete from (表n-1 子查询)
delete from (表n-2 子查询)
........................
delete from (表1 子查询)
END;
BEFORE delete ON 表名
FOR EACH ROW
BEGIN
delete from (表n-1 子查询)
delete from (表n-2 子查询)
........................
delete from (表1 子查询)
END;
解决方案 »
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