SQL TOP 10排名查询所需的帮助

Question

我有下面的代码，我试图找出在过去一个月使用的前10台服务器，但有问题，不是很好的SQL。如果需要可能有些帮助或建议。

我得到这个工作的前10位应用程序，但无法弄清楚如何做到这一点的十大服务器。

SELECT TOP 10 dbo_LU_SERVERNAME.SERVERNAME, Count(*) AS SessionNumbers
FROM dbo_LU_SERVERNAME INNER JOIN dbo_SDB_SESSION ON dbo_LU_SERVERNAME.PK_SERVERNAMEID = dbo_SDB_SESSION.FK_SERVERNAMEID
WHERE (((dbo_SDB_SESSION.SESSIONSTART) Between Now() And DateAdd("d",-30,Now())))
GROUP BY dbo_LU_SERVERNAME.SERVERNAME
ORDER BY Count(*) DESC;

UNION ALL SELECT "Other" AS SERVERNAME, Count(*) AS SessionNumbers
FROM (dbo_LU_SERVERNAME
INNER JOIN dbo_SDB_SESSION  
ON dbo_LU_SERVER.PK_SERVERID = dbo_SDB_SESSION.FK_SERVERID)  
LEFT JOIN (SELECT TOP 10 dbo_LU_SERVERNAME.SERVERNAME, Count(*) AS SessionNos 
           FROM dbo_LU_SERVERNAME
           INNER JOIN dbo_SDB_SESSION 
           ON dbo_LU_SERVER.PK_SERVERID = dbo_SDB_SESSION.FK_SERVERID
           WHERE (((dbo_SDB_SESSION.SESSIONSTART) Between Now() And DateAdd("d",-31,Now())))
           GROUP BY dbo_LU_SERVERNAME.SERVERNAME
           ORDER BY Count(*) DESC) AS s  ON dbo_LU_SERVERNAME.SERVERNAME = s.SERVERNAME

WHERE s.SERVERNAME Is Null
GROUP BY "Other";

这是正在为顶部10 APPS的SQL。

SELECT TOP 10 dbo_LU_APPNAME.APPNAME, Count(*) AS SessionNos
FROM dbo_LU_APPNAME INNER JOIN dbo_SDB_SESSION ON dbo_LU_APPNAME.PK_APPNAMEID = dbo_SDB_SESSION.FK_APPNAMEID
WHERE (((dbo_SDB_SESSION.SESSIONSTART) Between Now() And DateAdd("d",-30,Now())))
GROUP BY dbo_LU_APPNAME.APPNAME
ORDER BY Count(*) DESC;

UNION ALL SELECT "Other" AS APPNAME, Count(*) AS SessionNos 
FROM (dbo_LU_APPNAME
INNER JOIN dbo_SDB_SESSION  
ON dbo_LU_APPNAME.PK_APPNAMEID = dbo_SDB_SESSION.FK_APPNAMEID)  
LEFT JOIN (SELECT TOP 10 dbo_LU_APPNAME.APPNAME, Count(*) AS SessionNos 
           FROM dbo_LU_APPNAME
           INNER JOIN dbo_SDB_SESSION 
           ON dbo_LU_APPNAME.PK_APPNAMEID = dbo_SDB_SESSION.FK_APPNAMEID
           WHERE (((dbo_SDB_SESSION.SESSIONSTART) Between Now() And DateAdd("d",-31,Now())))
           GROUP BY dbo_LU_APPNAME.APPNAME
           ORDER BY Count(*) DESC) AS s  ON dbo_LU_APPNAME.APPNAME = s.APPNAME

WHERE s.APPNAME Is Null
GROUP BY "Other";

---

请注意，这些表为相关： dbo_LU_SERVER ---> FK_SERVERNAMEID，PK_SERVERID dbo_LU_SERVERNAME ---> PK_SERVERNAMEID dbo.SDB.SESSION ---> FK_SERVERID

我不知道我做错了。

请帮助。

感谢您

Answer 1

我设法回答我的问题。

SELECT TOP 10 dbo_LU_SERVERNAME.SERVERNAME, Count(*) AS SessionNumbers
FROM dbo_LU_SERVERNAME INNER JOIN dbo_SDB_SESSION ON dbo_LU_SERVERNAME.PK_SERVERNAMEID = dbo_SDB_SESSION.FK_SERVERID
WHERE (((dbo_SDB_SESSION.SESSIONSTART) Between Now() And DateAdd("d",-30,Now())))
GROUP BY dbo_LU_SERVERNAME.SERVERNAME
ORDER BY Count(*) DESC;

UNION ALL SELECT "Other" AS SERVERNAME, Count(*) AS SessionNumbers
FROM  (dbo_LU_SERVERNAME INNER JOIN dbo_SDB_SESSION ON dbo_LU_SERVERNAME.PK_SERVERNAMEID = dbo_SDB_SESSION.FK_SERVERID)
LEFT JOIN (SELECT TOP 10 dbo_LU_SERVERNAME.SERVERNAME, Count(*) AS SessionNos 
           FROM dbo_LU_SERVERNAME INNER JOIN dbo_SDB_SESSION ON dbo_LU_SERVERNAME.PK_SERVERNAMEID = dbo_SDB_SESSION.FK_SERVERID
           WHERE (((dbo_SDB_SESSION.SESSIONSTART) Between Now() And DateAdd("d",-31,Now())))
           GROUP BY dbo_LU_SERVERNAME.SERVERNAME
           ORDER BY Count(*) DESC) AS a  ON dbo_LU_SERVERNAME.SERVERNAME = a.SERVERNAME

WHERE a.SERVERNAME Is Null
GROUP BY "Other";

感谢您的意见，我曾问一个问题前一段时间几乎相同，这一点，但另外一个是关于两个相关的实体，这是三个相关的实体。

再次感谢

干杯：）