如何在此

Question

我有像这样的MS SQL数据库表

表A

+----+-----------+--------+
|ID  | Table2_FK |  Value |
+----+-----------+--------+
|1   | 7         |  X     |
|2   | 7         |  Y     |
|3   | 8         |  X     |
|4   | 8         |  Z     |
|5   | 9         |  W     |
|6   | 9         |  M     |
|5   | 10        |  X     |
|6   | 10        |  Z     |
+----+-----------+--------+

如果我在查询值时传递X和Z，我想查询获取Table2_FK的列表。在这个例子中，结果是8和10

它可以超过2个值

Answer 1

您可以使用group by和having：

执行此操作

select table2_fk
from t
where value in ('X', 'Z')
group by table2_fk
having count(*) = 2;

如果可以为键值复制值，请使用count(distinct value) = 2。 “2”是IN列表中的值的数量。

Answer 2

试试这个：

select distinct Table2_FK
  from TableA
 where value in ('X','Z');

Answer 3

您可以使用以下查询：

Select distinct table2_fk from (
   Select *, Ct = count(id) over (partition by table2_fk) from yourtable 
  ) a
  Where a.[Value] in ('X','Z') and a.Ct >= 2

Answer 4

您可以使用下面的查询

select 
   distinct Table2_FK 
from TableA a 
where exists (
select 1 1 from TableA b where b.value ='X' and a.Table2_FK =b.Table2_FK
)
and exists (
select 1 1 from TableA c where c.value ='Z' and a.Table2_FK =c.Table2_FK
)