Sql 一个50页的表格，它必须有多个标题级别。这比你的两个关卡要复杂得多，我完全不记得我是怎么做到的！ SELECT TOP 10 ApplicationTbl.AppName, Count(*) AS SessionNos FROM ApplicationTb

一个50页的表格，它必须有多个标题级别。这比你的两个关卡要复杂得多，我完全不记得我是怎么做到的！

SELECT TOP 10 ApplicationTbl.AppName, Count(*) AS SessionNos
FROM ApplicationTbl INNER JOIN SessionTbl ON ApplicationTbl.AppID = SessionTbl.AppID
GROUP BY ApplicationTbl.AppName;
ORDER BY Count(*) DESC; 

SELECT TOP 10 ApplicationTbl.AppName, Count(*) AS SessionNos
FROM ApplicationTbl 
INNER JOIN SessionTbl 
ON ApplicationTbl.AppID = SessionTbl.AppID
GROUP BY ApplicationTbl.AppName
ORDER BY Count(*) DESC

UNION ALL

SELECT "Other" AS AppName, Count(*) AS SessionNos
FROM (ApplicationTbl 
INNER JOIN SessionTbl 
ON ApplicationTbl.AppID = SessionTbl.AppID) 
LEFT JOIN (SELECT TOP 10 ApplicationTbl.AppName, Count(*) AS SessionNos
           FROM ApplicationTbl 
           INNER JOIN SessionTbl 
           ON ApplicationTbl.AppID = SessionTbl.AppID
           GROUP BY ApplicationTbl.AppName;
           ORDER BY Count(*) DESC)  AS s 
ON ApplicationTbl.AppName = s.AppName
WHERE s.AppName Is Null
GROUP BY "Other"