根据另一列中的最大值选择列

Question

我们假设有一个名为test的表格，其中有两列 - id和time。 id列不是唯一的。

我希望获得所有ID，其中任何行的ID都不超过 X 。

怎么做？

Answer 1

SELECT id FROM test
GROUP BY id
HAVING MAX(time) <= 'X'

Answer 2

这应该适合您的需要：

SELECT id 
FROM tableName 
WHERE time > '{X}' AND NOT ID = '{ID}'
GROUP BY id;

Answer 3

select distinct id
from table t
where t.id not in (select it.id
                   from table it
                   where it.time>@x)

Answer 4

SELECT t.id 
FROM table t
WHERE NOT EXISTS
  ( SELECT * 
    FROM table tt
    WHERE tt.time > X
      AND tt.id = t.id
  )

Answer 5

SELECT id FROM (
    SELECT max(time) as max_time, id
    FROM test
    GROUP BY id
) tmp
WHERE max_time < 'X'