Question

所以我的头衔可能没有意义。这就是我想要做的事情。

C1      C2          C3

A1      yes         X1
A2      no          X1
A3      maybe       X1
A4      yes         X2

所以我的条件是C2＆lt;＆gt;'不'。在这种情况下，我希望结果只包括

C1     C2     C3
A4     yes    X2

感谢您的帮助人员！

Answer 1

使用minus获取c3 no c2的所有select * from table where c3 in( select distinct c3 from table minus select distinct from table where c2 = 'no' )列表。并从表中仅选择那些行。

ReadAsync

Answer 2

你可以尝试：

with x as (
    select 'a1' as col1, 'yes' as col2, 'x1' as col3 from dual
    union all
    select 'a2' as col1, 'no' as col2, 'x1' as col3 from dual
    union all
    select 'a3' as col1, 'maybe' as col2, 'x1' as col3 from dual
    union all
    select 'a4' as col1, 'yes' as col2, 'x2' as col3 from dual
)
select *
from x
where not exists (
    select 1
    from x x2
    where x2.col3 = x.col3
    and x2.col2 = 'no'
);

输出：

COL1    COL2    COL3
a4  yes x2

Answer 3

一个简单的NOT IN就应该这样做。

Select * 
From   Table
Where  C3 Not In ( Select  C3 
                   From    Table 
                   Where   C2 = 'no')

如果还满足一个条件，则不会出现限制具有多个值的列

3 个答案: