〖Orz〗求一条sql语句 _PHP

〖Orz〗求1条sql语句
想优先 Rand() 出来 'phome_ecms_news' 表的 classid limit 1 (并且符合) isLast(终极栏目) = 1

然后再在表 'phome_enewsClass' 里面进行 RAND() limit 1

下面sql语句错误..不会写的情况下,只有表述一下思想了.

SQL code

SELECT * FROM 'phome_ecms_news' WHERE classid = (SELECT classid FROM 'phome_enewsClass' where islast=1 RAND() limit 1) RAND() limit 1;

------解决方案--------------------

SQL code

SELECT * FROM 'phome_ecms_news' WHERE classid IN  
  (
  SELECT classid FROM 'phome_enewsClass' where islast=1 ORDER BY RAND() limit 1
  )
  ORDER BY RAND() limit 1;