如何不联接而是粘合或缝制SQL Server中的三个表

How to NOT JOIN but glue or sew three tables in SQL Server

我有3张桌子：

Clients表：

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2
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ID Name
1 ClientName1
2 ClientName2
3 ClientName3

每个客户可能都有一些身份证明文件

表Documents：

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ID ClientId Document
1 1 ClientDocument11
2 1 ClientDocument21
3 1 ClientDocument31

4 2 ClientDocument12
5 2 ClientDocument22

6 3 ClientDocument13

每个客户也可能有一些银行帐户

表Accounts：

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ID ClientId Account
1 1 110000000000

2 2 120000000000
3 2 220000000000

4 3 130000000000
5 3 230000000000
6 3 330000000000

我不希望加入，而是将表Documents粘合或缝制到表Clients中，然后添加表Account以得到像这样的表：

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ID Name Document Account
1 ClientName1 ClientDocument11 110000000000
1 ClientName1 ClientDocument21 110000000000
1 ClientName1 ClientDocument31 110000000000

2 ClientName2 ClientDocument12 120000000000
2 ClientName2 ClientDocument22 220000000000

3 ClientName3 ClientDocument13 130000000000
3 ClientName3 ClientDocument13 230000000000
3 ClientName3 ClientDocument13 330000000000

或

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ID Name Document Account
1 ClientName1 ClientDocument11 110000000000
1 ClientDocument21
1 ClientDocument31

2 ClientName2 ClientDocument12 120000000000
2 ClientDocument22 220000000000

3 ClientName3 ClientDocument13 130000000000
3 230000000000
3 330000000000

如果您使用Client2查看行，则可以理解，使用JOIN无法实现：

1 2	2 ClientName2 ClientDocument12 120000000000 2 ClientName2 ClientDocument22 220000000000

在SQL Server中是否可以？

相关讨论

可以用SQL完成，但是有点麻烦。主要思想是为文档和科目分配行号(每个客户从1开始)，然后通过连接客户ID和行号进行完全外部联接：

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SELECT c.Id, c.Name, t.Document, t.Account
FROM Clients c
JOIN (
SELECT COALESCE(d.ClientId, a.ClientId) AS ClientId,
COALESCE(d.Line, a.Line) AS Line,
d.Document, a.Account
FROM (
SELECT ClientId, Document,
ROW_NUMBER() OVER (partition BY ClientId ORDER BY Document) AS Line
FROM Documents
) d
FULL OUTER JOIN (
SELECT ClientId, Account,
ROW_NUMBER() OVER (partition BY ClientId ORDER BY Account) AS Line
FROM Accounts
) a ON d.ClientId = a.ClientId AND d.Line = a.Line
) t ON c.Id = t.ClientId
ORDER BY c.Id, t.Line;

看小提琴。