如何检索失败的迭代SQL

Question

我有数据如下

ID Value
1  Failed
1  Failed
1  Failed
1  Passed
1  Failed
2  Failed
2  Failed
2  Failed
2  Failed
2  Failed

我想使用SQL仅检索Failed Iterations的ID。我该怎么做？

Answer 1

如果我正确理解了您的问题，您只想返回ids 所有 values等于failed的{​​{1}}。

如果是，您可以使用group by：

select id
from yourtable
group by id
having count(*) = sum(case when value = 'Failed' then 1 else 0 end)

Answer 2

这会对你有帮助，

select distinct a1.ID from B as a1
left join B as a2 on a1.id = a2.id  
                and a2.value <> 'failed'
where a1.value = 'failed'
    and a2.ID is null

虽然这会提供正确的结果，但我已经使用了join，但@sgeddes的回答看起来很棒！