MySQL触发器设置

1自动增长

BEGIN
     UPDATE company SET ar_count = ar_count+1 WHERE id = (SELECT company_id FROM architecter WHERE id = new.id);
END

 

2自动删除

BEGIN
     UPDATE company SET ar_count = ar_count-1 WHERE id = old.company_id;
END

在Navicat里的具体操做以下：