Question

这个查询是否可能：

select *
from   table t
where  (t.key1, t.key2, t.key3) IN ('a','b','c','d')

包含多个列和多个值的条件。

Answer 1

select *
from   table t
where  t.key1 IN ('a','b','c','d') OR
       t.key2 IN ('a','b','c','d') OR
       t.key3 IN ('a','b','c','d')

Answer 2

您必须将其拆分为多个语句。我不知道您是要OR还是AND，所以我在此示例中使用了AND：

select *
from   table t
where  (t.key1) IN ('a','b','c','d')
and    (t.key2) IN ('a','b','c','d')
and    (t.key3) IN ('a','b','c','d')

或使用join和内联视图：

select *
from   table t
join   ( select 'a' col
         from   dual
         union
         select 'b'
         from   dual
         union
         select 'c'
         from   dual
         union
         select 'd'
         from   dual
      ) x
on    t.key1 = x.col
and   t.key2 = x.col
and   t.key3 = x.col

如何在多列中使用“IN”运算符？

2 个答案: