SQL选择查询到另一个查询

Question

如果我的术语/编码有点偏离，或者也许离开，我是一个有SQL的初学者，请事先道歉。 我有两个我想加入其中的查询。第一个创建包含两个特定过程的产品列表。 然后我想在第二个查询中使用这些productids。

也是正确的？ （总和（当processid如'pick％'然后1 else 0 end时）+ sum（当processid如'pack％'then 1 else 0 end时）= 2）

任何帮助将不胜感激，希望这是有道理的。

SELECT 
Products.ProductID 
FROM Products 
INNER JOIN Categories ON Products.Category = Categories.Category 
INNER JOIN Boms ON Products.Product = Boms.Product AND Boms.BomVersion = Products.BomVersion 
LEFT OUTER JOIN Products AS Comp ON Boms.Component = Comp.Product 
LEFT OUTER JOIN Processes ON Boms.Process = Processes.Process 
WHERE 
products.active = 1 
and Categorys.Categoryid in ('5','20') 
group by products.productid 
having (sum(case when processid like 'pick%' then 1 else 0 end) + sum(case when processid like 'pack%' then 1 else 0 end) = 2) 
order by products.productid 


SELECT 
Products.ProductID, 
Products.productdescription, 
Boms.Type As Type, 
Comp.ProductId as Component, 
Comp.productdescription, 
Boms.Quantity, 
BomVersions.BomVersionID, 
Processes.processid, 
Processes.ProcessDescription 
FROM Products 
INNER JOIN Categories ON Products.Category = Categories.Category 
INNER JOIN Boms ON Products.Product = Boms.Product AND Boms.BomVersion = Products.BomVersion 
LEFT OUTER JOIN Products AS Comp ON Boms.Component = Comp.Product 
LEFT OUTER JOIN Processes ON Boms.Process = Processes.Process 
INNER JOIN BomVersions ON Products.BomVersion = BomVersions.BomVersion 
WHERE 
products.active = 1 

order by products.productid, products.type,comp.productid 

Answer 1

要合并它们，您可以执行以下操作。

SELECT b.* 
FROM 
    (SELECT Products.ProductID FROM Products INNER JOIN ...) AS a 
    INNER JOIN 
    (SELECT Products.ProductID, Products.productdescription, Boms.Type As Type, ...) AS b 
    ON a.ProductID = b.ProductID