学历认证在线验证码:一个SQL问题

来源:百度文库 编辑:神马品牌网 时间:2024/04/29 06:11:04
sql = "SELECT top 1000 max(renewtime),bookid from article GROUP BY bookid ORDER BY max(renewtime) DESC"
在此表把bookid群组, 因为要判断bookid的类型.而bookid类型在 book表booktypeid里面.
需要在此SQL语句判断bookid的booktypeid类型=1
请问在此语句怎么加.

SELECT top 1000 max(a.renewtime),a.bookid from article a inner join book b on a.bookid = b.bookid where b.booktypeid=1 GROUP BY a.bookid ORDER BY max(a.renewtime) DESC