Ausführliche Erläuterung der Betriebsbeispiele von Triggern in MySQL

create trigger trigger_name before|after trigger_event on table_name for each row trigger_stmt;

create trigger tri_test after insert on t1 for each row insert into t1_log values(USER(),'insert record into t1',now()); 
// 表示的是在对表t1的每一行进行插入操作之后,在表t1_log中插入一条数据,数据是values之后的内容,USER()指的是当前的用户(内置函数),now()当前时间.

create trigger trigger_name before|after trigger_event on table_name for each row BEGIN trigger_stmt end;

delimiter $$
create trigger tri_test
after insert on t1 for each row
BEGIN
insert into t1_log values(USER(),'after insert table t1',now());
insert into t1_log values(USER(),'after insert table t1',now());
END
$$

show triggers /G;
在information_schema数据库中查询
use information_schema;
select * from TRIGGERS where trigger_name = 'tri_test' \G;