sql - 编写联接的更好方法

Question

我将以下语句放在一起，我知道这很长，最初创建时是在 Microsoft Query 中完成的，因此它不会进行正确的连接。进行连接的最佳方法是什么？我正在形成一个进度数据库，将查询直接拉入 Excel。

SELECT 

Company_0.CoaCompanyName
,Company_0.CompanyID
, SopOrder_0.SooOrderDate
, Count(DISTINCT SopOrder_0.SooParentOrderReference) AS 'Orders'
, SUM(CASE WHEN SopOrder_0.SooOrderNumber IS NOT NULL THEN 1 ELSE 0 END) AS 'Order Items'
, SUM(SopOrderItem_0.SoiValue) AS 'Order Value'
,(CASE WHEN SopOrder_0.SooParentOrderReference LIKE 'INT%' THEN 'INT' ELSE 'WEB' END) AS 'OrderType'
,(CASE WHEN Company_0.CompanyID IN (7942127,7950986,7955733,7955922,7956194,9166261,9167003,9167015,9167821,9168185,71108583,153823092,239325930,248936585,484537132,484562257,492867962,497661455) THEN 'Blue'
WHEN Company_0.CompanyID IN (7941326,7942863,7951258,7985610,8054787,8059257,8071540,9165903,9166385,9167199,9167239,9168059,9168092,9168309,9176378,87527213,137281027,141171263,187080272,206550932,206567582,206653611,261731657,291593618,332362604,335570516,335584157,335636738,335780251,337122588,337321409,337495183,338813206,339895994,340298080,345796060,352141359,355461038,367864957,368581219,380483346,388367115,394146462,420408339,422017277,482844312,484535001,490217153,500689836,530081645,626234139,626240584) THEN 'Green'
WHEN Company_0.CompanyID IN (7937292,10245154,12081274,69822571,244700075,348041567,350378220,369621811,492752273,492810572,495589681,497434153,497436315,497447995,497501580,497640064,497687156,524765392,543828284,544700552,577727766) THEN 'InterGroup'
WHEN Company_0.CompanyID IN (390329465,7939077,7939153,7939643,7941067,7941441,7948530,7954220,7954463,7967527,7967564,7967581,7967598,7967615,7967632,7972683,8010930,8055406,8145843,8298176,8555272,8557302,9165068,9165858,9165941,9165990,9166173,9166187,9166221,9166275,9166408,9166733,9166771,9166817,9166839,9167420,9167441,9167462,9167785,9167852,9167909,9168157,9168555,9168579,9168656,9168739,9872539,12079739,12085840,12090519,13801203,18579021,34030102,34324342,34387765,58651641,70893751,75695054,94804172,104968711,124831809,135938287,140557486,155773253,170949925,181601032,181716302,181882963,185256839,191685680,195478063,196446370,196668711,198801097,203101459,217752161,230159704,241060623,246550560,248306594,252917455,272669511,275471863,294618970,302920726,305222885,327567159,328144055,330709733,332849207,337549264,337731848,340242946,340680961,348334040,349629764,350498903,357825478,358320695,362987262,391331042,400869283,401815465,428957939,429336116,432275881,432279597,443630203,450567544,453988169,484512602,484520712,484533033,484534199,484535847,484544428,484545125,484547021,484553137,487900076,491242614,492744710,492787927,492799726,492866923,497444080,497483018,499764323,501511914,502110491,503540613,503636535,504164530,508658401,508888435,508928101,511003520,513859770,517955290,519195801,523016532,527792211,542417909,547466213,549446456,553500528,553903855,557276314,558877342,575056260,591279217,592140130,600576497,602002033,615324116,626695365,633057105) THEN 'RED'
WHEN Company_0.CompanyID IN (7939412,7939655,7941712,8054218,8054544,8054567,8059303,9166056,9168330,94823141,303192985,337650213,340055053,357598514,506835671,512310844,574877608,576590130,603197632) THEN 'Yellow'
ELSE NULL
END) AS 'Cell'
,(CASE 
WHEN SopOrderItem.SoiProcessMethod = 0 AND SopOrderItem.SoiReplenishmentOrder = 1 AND SopProduct.SopPrePostPaid = 0 THEN 'Replenishment Pay on Replenishment'
WHEN SopOrderItem.SoiProcessMethod = 0 AND SopOrderItem.SoiReplenishmentOrder = 1 AND SopProduct.SopPrePostPaid <> 0 THEN 'Replenishment Pay on Delivery'
WHEN SopOrderItem.SoiProcessMethod = 0 AND SopOrderItem.SoiReplenishmentOrder = 0 THEN 'Call off'
WHEN SopOrderItem.SoiProcessMethod = 1 THEN 'On Demand'
WHEN SopOrderItem.SoiProcessMethod = 2 THEN 'Personalised'
ELSE 'Service'
END) AS 'OrderMethod'

FROM 

SBS.PUB.Company Company_0
, SBS.PUB.SopOrder SopOrder_0
, SBS.PUB.SopOrderItem SopOrderItem_0
, SBS.PUB.SopProduct SopProduct_0

WHERE 

SopOrder_0.SopOrderID = SopOrderItem_0.SopOrderID 
AND Company_0.CompanyID = SopOrder_0.CompanyID
AND SopOrderItem_0.SopProductID = SopProduct_0.SopProductID
AND SopOrder_0.SooOrderDate > '2018-01-01'
AND Company_0.CompanyID  <> '66643115'


GROUP BY 

Company_0.CoaCompanyName
,SopOrder_0.SooOrderDate
,Company_0.CompanyID
,Cell
,OrderType
,OrderMethod

我的想法应该是这样的:

FROM 

SBS.PUB.SopOrderItem SopOrderItem_0
INNER JOIN SBS.PUB.Company Company_0 ON  SopOrder_0.CompanyID = Company_0.CompanyID
INNER JOIN SBS.PUB.SopOrder SopOrder_0 ON SopOrderItem_0.SopOrderItemID = SopOrder_0.SopOrderID
LEFT JOIN SBS.PUB.SopProduct SopProduct_0 ON SopOrderItem_0.SopProductID =  SopProduct_0.SopProductID


WHERE 

但是，当我尝试返回此内容时，我收到一个错误，即无法找到 SopOrder_0.CompanyID，即使我知道它在表中，因为原始基本连接查询有效。

Answer 1

我想这就是你要找的:

SELECT ....
FROM SBS.PUB.Company Company_0
JOIN SBS.PUB.SopOrder SopOrder_0
    ON Company_0.CompanyID = SopOrder_0.CompanyID
JOIN SBS.PUB.SopOrderItem SopOrderItem_0
    ON SopOrder_0.SopOrderID = SopOrderItem_0.SopOrderID
JOIN SBS.PUB.SopProduct SopProduct_0
    ON SopOrderItem_0.SopProductID = SopProduct_0.SopProductID

WHERE SopOrder_0.SooOrderDate > '2018-01-01'
AND Company_0.CompanyID  <> '66643115'

我在您的原始查询中没有看到左连接，因此我已将所有连接转换为内部连接。