SELECT *,checkQty-agoQty as errorQty FROM `mtlschecklog` WHERE ( 1 ) ORDER BY checkDate desc LIMIT 0,50
我是用
$mtlsCheckLogObj->field('*,checkQty-agoQty as errorQty')->where($where)->order($orderField)->limit($p->offset().','. 50)->select();
但是ThinkPHP说用到as errorQty会产生错误