我很难使用复杂的连接，我需要加入两个相同的两个表，并确保每次只使用特定记录（最新的）连接。
SELECT c.collection_id AS collections,
s.strat_id AS StrategyId,
s.strat_version AS StrategyVersion,
ssb.side_ordering AS SSB_SO,
ssb2.side_ordering AS SSB2_SO,
Invoice1.invoice_id AS Inv1ID,
Invoice2.invoice_id AS Inv2ID,
Invoice1.printeddate AS Inv1PrintedDate,
Invoice2.printeddate AS Inv2PrintedDate
FROM dbo.collections AS c
INNER JOIN dbo.strategies AS s
ON c.collection_id = s.collection_id
INNER JOIN dbo.side_strat_brkrgs AS ssb
ON s.collection_id = ssb.collection_id
AND s.strat_id = ssb.strat_id
AND s.strat_version = ssb.strat_version
INNER JOIN dbo.strat_sides AS ss
ON ss.strat_side_id = ssb.strat_side_id
LEFT OUTER JOIN dbo.side_strat_brkrgs AS ssb2
ON ssb2.collection_id = ssb.collection_id
AND ssb2.strat_id = ssb.strat_id
AND ssb2.strat_version = ssb.strat_version
AND ssb2.side_ordering <> ssb.side_ordering
INNER JOIN dbo.strat_sides AS ss2
ON ss2.strat_side_id = ssb2.strat_side_id
LEFT OUTER JOIN dbo.newinvoiceitem AS InvoiceItem1
ON ssb.collection_id = InvoiceItem1.collection_id
AND ssb.side_ordering = InvoiceItem1.side_ordering
AND s.strat_id = InvoiceItem1.strat_id
LEFT OUTER JOIN dbo.newinvoice AS Invoice1
ON Invoice1.invoice_id = InvoiceItem1.invoice_id
LEFT OUTER JOIN dbo.newinvoiceitem AS InvoiceItem2
ON ssb2.collection_id = InvoiceItem2.collection_id
AND ssb2.side_ordering = InvoiceItem2.side_ordering
AND s.strat_id = InvoiceItem2.strat_id
LEFT OUTER JOIN dbo.newinvoice AS Invoice2
ON Invoice2.invoice_id = InvoiceItem2.invoice_id
WHERE NOT EXISTS (SELECT 1
FROM dbo.newinvoiceitem tempInvoiceItem1
INNER JOIN dbo.newinvoice AS tempInvoice1
ON tempInvoice1.invoice_id =
tempInvoiceItem1.invoice_id
WHERE tempInvoiceItem1.collection_id = ssb.collection_id
AND ssb.side_ordering = tempInvoiceItem1.side_ordering
AND s.strat_id = tempInvoiceItem1.strat_id
AND s.strat_version = tempInvoiceItem1.strat_version
AND tempInvoice1.printeddate > Invoice1.printeddate)
AND NOT EXISTS (SELECT 1
FROM dbo.newinvoiceitem tempInvoiceItem2
INNER JOIN dbo.newinvoice AS tempInvoice2
ON tempInvoice2.invoice_id =
tempInvoiceItem2.invoice_id
WHERE
tempInvoiceItem2.collection_id = ssb2.collection_id
AND ssb2.side_ordering = tempInvoiceItem2.side_ordering
AND s.strat_id = tempInvoiceItem2.strat_id
AND s.strat_version = tempInvoiceItem2.strat_version
AND tempInvoice2.printeddate > Invoice2.printeddate)
AND c.collection_id = 16447
我获得了以下结果：
16447 1 3 1 0 3785 3183 2010-05-06 17:52:00 2010-05-06 17:52:00
16447 1 3 1 0 3785 4033 2010-05-06 17:52:00 2010-05-10 16:32:00
16447 1 3 1 0 4137 3183 2010-05-20 17:08:00 2010-05-06 17:52:00
16447 1 3 1 0 4137 4033 2010-05-20 17:08:00 2010-05-10 16:32:00
虽然我实际上只期待最后一排。我哪里错了？
如你所见，我无法使用MAX（）来检索最高记录，因为我需要通过JOIN查找另一个属性，并且我被迫使用NOT EXIST
答案 0 :(得分：3)
试试这个谓词
WHERE EXISTS (SELECT 1
FROM dbo.newinvoiceitem tempInvoiceItem1
INNER JOIN dbo.newinvoice AS tempInvoice1
ON tempInvoice1.invoice_id = tempInvoiceItem1.invoice_id
WHERE tempInvoiceItem1.collection_id = ssb.collection_id
AND ssb.side_ordering = tempInvoiceItem1.side_ordering
AND s.strat_id = tempInvoiceItem1.strat_id
HAVING MAX(tempInvoice1.printeddate) = Invoice1.printeddate
OR Invoice1.printeddate IS NULL
)
AND EXISTS (SELECT 1
FROM dbo.newinvoiceitem tempInvoiceItem2
INNER JOIN dbo.newinvoice AS tempInvoice2
ON tempInvoice2.invoice_id = tempInvoiceItem2.invoice_id
WHERE tempInvoiceItem2.collection_id = ssb2.collection_id
AND ssb2.side_ordering = tempInvoiceItem2.side_ordering
AND s.strat_id = tempInvoiceItem2.strat_id
HAVING MAX(tempInvoice2.printeddate) = Invoice2.printeddate
OR Invoice2.printeddate IS NULL
)
AND c.collection_id = 16447
OR
WHERE EXISTS (SELECT 1
FROM dbo.newinvoiceitem tempInvoiceItem1
INNER JOIN dbo.newinvoice AS tempInvoice1
ON tempInvoice1.invoice_id = tempInvoiceItem1.invoice_id
WHERE tempInvoiceItem1.collection_id = ssb.collection_id
AND ssb.side_ordering = tempInvoiceItem1.side_ordering
AND s.strat_id = tempInvoiceItem1.strat_id
HAVING MAX(tempInvoice1.printeddate) = Invoice1.printeddate
)
AND EXISTS (SELECT 1
FROM dbo.newinvoiceitem tempInvoiceItem2
INNER JOIN dbo.newinvoice AS tempInvoice2
ON tempInvoice2.invoice_id = tempInvoiceItem2.invoice_id
WHERE tempInvoiceItem2.collection_id = ssb2.collection_id
AND ssb2.side_ordering = tempInvoiceItem2.side_ordering
AND s.strat_id = tempInvoiceItem2.strat_id
HAVING MAX(tempInvoice2.printeddate) = Invoice2.printeddate
)
AND c.collection_id = 16447 OR Invoice1.printeddate IS NULL
OR Invoice2.printeddate IS NULL