两个子项选入“中”；在；（oracle，sql）

如何在两个子选择中使用into

我现在：

select colA, colB from table1 where colC in
                 (select T1 from tableT1 where colx = 'Y')
                 and ColD = 'Y';

我还需要colC进入第二个子选择：

select colA, colB from table1 where colC in
                 ((select T1 from tableT1 where colx = 'Y')
                  or
                 (select T2 from tableT2 where colx = 'Y'))
                 and ColD = 'Y';

---

有可能吗？或者某个联合体？

您可以使用

联合体：

where colC in
(
    select T1 from tableT1 where colx = 'Y'
    union
    select T2 from tableT2 where colx = 'Y'
)
and ColD = 'Y'

您可以使用
联合体
：

where colC in
(
    select T1 from tableT1 where colx = 'Y'
    union
    select T2 from tableT2 where colx = 'Y'
)
and ColD = 'Y'

请尝试此查询

select colA, colB from 
                 ((select T1 as T, ColA,colB from tableT1 where colx = 'Y')
                  Union
                 (select  T2 as T, ColA,colB from tableT2 where colx = 'Y'))  as table1 where table1.T = ColC
                 and ColD = 'Y';

我假设Colc是一个值而不是一列，因为您不能在where case中使用列名来搜索您在问题中提到的值

select colA, colB from 
                 ((select T1 as T, ColA,colB from tableT1 where colx = 'Y')
                  Union
                 (select  T2 as T, ColA,colB from tableT2 where colx = 'Y'))  as table1 where table1.T = ColC
                 and ColD = 'Y';

我假设Colc是一个值而不是一列，因为您不能在where-cause中使用列名来搜索您在问题中提到的值

我还需要colC进入第二个子选择：

select colA, colB from table1 where colC in
                 ((select T1 from tableT1 where colx = 'Y')
                  or
                 (select T2 from tableT2 where colx = 'Y'))
                 and ColD = 'Y';

如果需要在两个表中都显示，则可以执行以下操作：

select colA, colB
from   table1
where  colC in ( select T1 from tableT1 where colx = 'Y' )
AND    colC in ( select T2 from tableT2 where colx = 'Y' )
AND    ColD = 'Y';

select colA, colB
from   table1
where  (  colC in ( select T1 from tableT1 where colx = 'Y' )
       OR colC in ( select T2 from tableT2 where colx = 'Y' )
       )
AND    ColD = 'Y';

如果需要将其放在一个或另一个（或两个）表中，则可以执行以下操作：

select colA, colB
from   table1
where  colC in ( select T1 from tableT1 where colx = 'Y' )
AND    colC in ( select T2 from tableT2 where colx = 'Y' )
AND    ColD = 'Y';

select colA, colB
from   table1
where  (  colC in ( select T1 from tableT1 where colx = 'Y' )
       OR colC in ( select T2 from tableT2 where colx = 'Y' )
       )
AND    ColD = 'Y';

我还需要colC进入第二个子选择：

select colA, colB from table1 where colC in
                 ((select T1 from tableT1 where colx = 'Y')
                  or
                 (select T2 from tableT2 where colx = 'Y'))
                 and ColD = 'Y';

如果需要在两个表中都显示，则可以执行以下操作：

select colA, colB
from   table1
where  colC in ( select T1 from tableT1 where colx = 'Y' )
AND    colC in ( select T2 from tableT2 where colx = 'Y' )
AND    ColD = 'Y';

select colA, colB
from   table1
where  (  colC in ( select T1 from tableT1 where colx = 'Y' )
       OR colC in ( select T2 from tableT2 where colx = 'Y' )
       )
AND    ColD = 'Y';

如果需要将其放在一个或另一个（或两个）表中，则可以执行以下操作：

select colA, colB
from   table1
where  colC in ( select T1 from tableT1 where colx = 'Y' )
AND    colC in ( select T2 from tableT2 where colx = 'Y' )
AND    ColD = 'Y';

select colA, colB
from   table1
where  (  colC in ( select T1 from tableT1 where colx = 'Y' )
       OR colC in ( select T2 from tableT2 where colx = 'Y' )
       )
AND    ColD = 'Y';

colC-in或colC-in
请重新表述您的问题，提供更多的上下文，并更好地解释您试图完成的任务。
colC-in或colC-in
请重新表述您的问题，提供更多的上下文，以及更好地解释您试图实现的目标。使用
UNION ALL
是否更有效？OP询问“我也需要colC将进入第二个子选择”-OP的语言并不完全清楚，但这将给出“colC IN（第一个子选择）或colC IN（第二个子选择）”而我认为OP的问题需要“colC IN（第一次选择）和colC IN（第二次选择）”。@MT0：如果必须在两个子集中，可以使用
intersect
而不是
union
。同意
union all
会更有效。谢谢@andomarw使用
union all
会更有效吗？OP问“我也需要colC将进入第二个子选择”-OP的语言不完全清楚，但会给出“colC IN（第一个子选择）或colC IN（第二个子选择）”而我认为OP的问题需要“colC IN（第一次选择）和colC IN（第二次选择）”。@MT0：如果必须在两个子集中，可以使用
intersect
而不是
union
。同意“联合所有人”
会更有效率。谢谢@Andomar