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【mysql学习笔记29】触发器
2022-07-06 07:13:00 【yqs_281876918】
创建
CREATE TRIGGER trigger_name
BEFORE/AFTER INSERT/UPDATE/DELETE
ON tb_name FOR EACH ROW – 行级触发器
BEGIN
trigger_statement;
END;
查看
SHOW TRIGGERS;
删除
DROP TRIGGER [schema_name.]trigger_name; --没有指定schema_name默认为当前数据库
案例
create trigger tb_user_insert_trigger after insert on tb_user for each row
begin
insert into tb_logs(id,operation,operate_time,operate_id,operate_params)
values(null,'insert',now(),new.id,concat('插入的数据内容为:',new.content));
end;
create trigger tb_user_insert_trigger after update on tb_user for each row
begin
insert into tb_logs(id,operation,operate_time,operate_id,operate_params)
values(null,'update',now(),new.id,concat('更新前数据:',old.content));
end;
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