MySQL觸發器設置

1自動增長

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

 

2自動刪除

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

在Navicat裏的具體操做以下：