group by 与 order by的用法一例

USE [mydb]
go

WITH w AS(
    SELECT TOP 6 InfoId FROM(
        SELECT InfoId FROM(
            SELECT TOP 6
                b.InfoId
                FROM dbo.[BrowseLog] b,dbo.[Info] i
                WHERE b.InfoId=i.InfoId
                    AND i.CityId=3
                GROUP BY b.InfoId
                ORDER BY MAX(b.BrowseId) DESC
        ) i1
        UNION
        SELECT InfoId FROM(
            SELECT TOP 6
                InfoId
                FROM dbo.[Info]
                WHERE CityId=3
                ORDER BY InfoId DESC
        ) i2
    ) u
    ORDER BY InfoId ASC
)
SELECT   
    w.InfoID
    ,i.[desc]
    ,i.small_pic_url
    ,s.SiteUrl
    ,s.SiteName
    FROM w,dbo.[Info] i,dbo.[Site] s
    WHERE w.InfoId=i.InfoId
        AND i.SiteId=s.SiteId
    ORDER BY w.InfoId DESC;