我想先查询出分卷，然后每个分卷中都显示最新的一个章节，用一句sql语句怎么实现？ SELECT v.*,s.subject from volume v LEFT JOIN section s ON s.volid=v.volid 用left join 能不能实现降序的？当然可以，直接跟上 ORDER BY volid DESC//换成你想要的就是，一样的啊
SELECT v.*,s.subject from volume v LEFT JOIN section s ON s.volid=v.volid ORDER BY s.dateline WHERE v.volid>2 DESC ORDER BY v.dateline DESC
这样？ 这样报错的
SELECT v.*,s.subject from volume v LEFT JOIN section s ON s.volid=v.volid ORDER BY s.dateline DESC WHERE v.volid>2 ORDER BY v.dateline DESC
这样？ 这样报错的 SQL code: SELECT v.*,s.subject from volume v LEFT JOIN section s ON s.volid=v.volid WHERE v.volid>2 ORDER BY v.dateline DESC
String sqlCount="select count(*) from usertable where username='"+ userName+"'";这句话 什么意思啊！ 这句话输出出来就是 select count(*) from usertable where username='你的变量 ......
是用别人写的类做的，还原时提示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 'INSERT INTO admin(seq,passwd,type,n ......
