create or replace trigger tr_name
BEFORE delete on lesson
for each row
begin
delete from stu_lesson where xuhao = :new.xuhao;
end tr_name;
类似的写一个student表的触发器
BEFORE delete on lesson
for each row
begin
delete from stu_lesson where xuhao = :new.xuhao;
end tr_name;
类似的写一个student表的触发器
解决方案 »
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