统计记录:
select count(*) as total from [!db.pre!]ecms_news union select count(*) as total from [!db.pre!]ecms_movie
查询记录:
select classid,id,titleurl,title,newstime from [!db.pre!]ecms_news union select classid,id,titleurl,title,newstime from [!db.pre!]ecms_movie order by newstime desc
-----------------------注释：-------------------------------
以上调用的是（新闻模型：news、电影模型：movie）两个模型的文章，两个模型用"Union"连接调用
若指定栏目用：where classid in(46,47,51)，
若调用推荐在其后追加：and isgood=1，
若指定调用条数在其后追加：limit 10
