高手指点一下,那种写法的语句执行效率更高!delete from t_BusinessInfoPic where BusinessInfoID in ( select ID from t_BusinessInfo where MemberID = 变量)delete t_BusinessInfoPic from t_BusinessInfo,t_BusinessInfoPic where t_BusinessInfo.MemberID=1 and t_BusinessInfoPic.BusinessInfoID=t_BusinessInfo.id
好象用in效率低些