Question

我在写一个棘手的问题时遇到了问题。我有下表（作为例子）

fusionId | productId | departmentId
    1    |     1     |       1
    2    |     1     |       2
    3    |     2     |       1
    4    |     3     |       2

我想要一个查询，我可以将两个departmentId传递给（1,2），并且只有当productId与departmentId匹配时才会返回productId departmentId 1}}

例如，如果我发送了productId 1的1＆amp; 2我会得到结果

{{1}}

这可能吗？

Answer 1

SELECT productId 
FROM YourTable
WHERE departmentId IN (1,2)
GROUP BY productId 
HAVING COUNT(DISTINCT departmentId) = 2

或者

SELECT productId 
FROM YourTable
WHERE departmentId = 1
INTERSECT
SELECT productId 
FROM YourTable
WHERE departmentId = 2

Answer 2

Create Table Temporary 
(
    fusionId  int,
    productId  int,
    departmentId int,
)

insert into Temporary values (1,1,1),(2,1,2),(3,2,1),(4,3,2)

Select productId  from Temporary 
Where productId in (Select productId from Temporary where departmentId = 1) and departmentId =2

Answer 3

SELECT productId 
FROM YourTable
WHERE departmentId IN (1,2)
GROUP bY productId 
HAVING COUNT(productId) > 1

SQL Server难以查询

3 个答案: