create trigger 触发器名
before|after delete|insert|update
on 表名 
for each row
begin
     触发语句
end;
//创建触发器,触发器名为 audit_log
create trigger audit_log
//触发器执行在insert操作之后
after insert 
//监视employees_test表
on employees_test
for each row
begin
    //触发触发器后执行将记录插入到audit表中
    insert into audit values(new.id,new.name);
end;