Question

我应该写一个查询来查找“查找总销售额最高的艺术家的名字”。我写的查询就是这个：

SELECT Ar.Name, SUM(IL.UnitPrice) AS ts
FROM Artist Ar
    JOIN Album Al ON Ar.ArtistId=Al.ArtistId
    JOIN Track Tr ON Al.AlbumId=Tr.AlbumId
    JOIN InvoiceLine IL ON IL.TrackId=Tr.TrackId
    JOIN Invoice I ON I.InvoiceId=IL.InvoiceId
GROUP BY Ar.Name
HAVING ts >= ALL (SELECT SUM(IL.UnitPrice) AS ts
FROM Artist Ar
    JOIN Album Al ON Ar.ArtistId=Al.ArtistId
    JOIN Track Tr ON Al.AlbumId=Tr.AlbumId
    JOIN InvoiceLine IL ON IL.TrackId=Tr.TrackId
    JOIN Invoice I ON I.InvoiceId=IL.InvoiceId
GROUP BY Ar.Name)

我正在使用DB Browser for SQLite，当我运行查询时，它显示near "ALL" syntax error: 此查询应适用于Chinook数据库，架构位于this link

谢谢。

Answer 1

您可以使用order by和limit。当没有最高销售额的关系时，这将起作用。

SELECT Ar.Name, SUM(IL.UnitPrice) AS ts
FROM Artist Ar
    JOIN Album Al ON Ar.ArtistId=Al.ArtistId
    JOIN Track Tr ON Al.AlbumId=Tr.AlbumId
    JOIN InvoiceLine IL ON IL.TrackId=Tr.TrackId
    JOIN Invoice I ON I.InvoiceId=IL.InvoiceId
GROUP BY Ar.Name
ORDER BY ts DESC LIMIT 1

编辑：在发生关系时获得所有最大销售额。

select t1.name from
(SELECT Ar.Name, SUM(IL.UnitPrice) AS ts
FROM Artist Ar
    JOIN Album Al ON Ar.ArtistId=Al.ArtistId
    JOIN Track Tr ON Al.AlbumId=Tr.AlbumId
    JOIN InvoiceLine IL ON IL.TrackId=Tr.TrackId
    JOIN Invoice I ON I.InvoiceId=IL.InvoiceId
    GROUP BY Ar.Name) t1
JOIN (select max(ts) as maxsale from
          (SELECT Ar.Name, SUM(IL.UnitPrice) AS ts
           FROM Artist Ar
           JOIN Album Al ON Ar.ArtistId=Al.ArtistId
           JOIN Track Tr ON Al.AlbumId=Tr.AlbumId
           JOIN InvoiceLine IL ON IL.TrackId=Tr.TrackId
           JOIN Invoice I ON I.InvoiceId=IL.InvoiceId
           GROUP BY Ar.Name) t) totals 
ON totals.maxsale = t1.ts

在SQLite中使用ALL查找属性的最高值

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