我有两个表，A和B
A表存储文章信息，B表存储对A中的文章评论信息，两个表之间通过docid来关联。现在我想按照每个文章评论数的多少来降序或升序查出文章，我该怎么做呢？

[ 本帖最后由 chsan 于 2008-4-22 15:39 编辑 ]

select b.docid,count(1) as count left join b using(docid) group by a.docid order by count desc;

谢谢版主，在你的提示下，我的问题解决了，附上最后查询语句：
select B.docid, A.*,count(1) as count from B  left join A using(docid)  group by A.docid order by count desc ;

但是现在还有个问题，那就是我在计算评论总数时有个条件，就是只计算那些已经审核了的评论，是用where语句吗，用where又应该放在什么地方呢？

1、select B.docid, A.*,count(1) as count from B  left join A on (a.docid = b.docid and ...) group by A.docid order by count desc ;
2、select B.docid, A.*,count(1) as count from B  left join A using(docid) where ... group by A.docid order by count desc ;

非常感谢，用第二种办法解决了，辛苦了！

学习，这样可不可以?
select a.docid,t.total
from a
left join
(
select b.docid,count(*) total
from b
group by b.docid
) t1
on a.docid=t.docid
order by total;