SQL语句出错：select * from member_follow where MemberId= and FollowMemberId=339 and IsDel=0  order by 1 asc limit 1<br>错误代码：<i>#1064</i> - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'and FollowMemberId=339 and IsDel=0  order by 1 asc limit 1' at line 1