如何用触发器在MySQL数据库中删除A表一条数
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使用delete 触发器格式:
CREATE trigger tri_update
on tablename
for delete
as
begin
--sql code
end
例:
CREATE trigger tri_update
on tablename1 --触发的表名
for delete
as
begin
declare @del_id varchar(40)
select @del_id = id from deleted --tablename1 中删除的数据保存在 deleted 中
delete tablename2 where id = @del_id --同步删除tablename2中数据
end
CREATE trigger tri_update
on tablename
for delete
as
begin
--sql code
end
例:
CREATE trigger tri_update
on tablename1 --触发的表名
for delete
as
begin
declare @del_id varchar(40)
select @del_id = id from deleted --tablename1 中删除的数据保存在 deleted 中
delete tablename2 where id = @del_id --同步删除tablename2中数据
end
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