将多个JOINS重写为SUBQUERIES

Question

我需要在我的艺术家表中找到代表特定乐队的所有销售人员的姓名。

我的表格重申了以下内容：

销售人员

SalesID，名字，姓氏

艺术家

ArtistID，ArtistName

成员

MembersID，名字，姓氏。 SalesID

MembersID和Artists表与下表相关：

xRefArtistsMembers

ArtistID，MemberID

我制定了以下查询：

 select sp.firstname, sp.lastname from salespeople sp
 inner join members m on (m.salesid = sp.salesid)
 inner join xrefartistsmembers x on (x.memberid = m.memberid)
 inner join artists a where a.artistname = "The Bullets";

他们也是用子查询做这个的方法吗？

Answer 1

试试这个：

select sp.firstname, sp.lastname from salespeople sp
inner join members m on (m.salesid = sp.salesid)
inner join xrefartistsmembers x on (x.memberid = m.memberid)
inner join artists a on a.artistID = x.artistID
where a.artistname = "The Bullets"

Answer 2

你对艺术家的内部联系不应该有on条款，而不是你的where条款吗？

inner join artists a where a.artistname = "The Bullets";

将是

inner join artists a on a.artistid = x.artistid
where artists.artistname = "The Bullets";