记录中的SQL查询问题

Question

使用以下查询记录时出现问题

SELECT user_id FROM temp 
  WHERE 
    (value = 1 AND field_id = 11) AND 
    value = 1 AND field_id = 12

这是桌子。

我应该获得101个user_id的记录。

对此有任何想法吗？

Answer 1

您需要按用户聚合：

SELECT user_id
FROM temp
GROUP BY user_id
HAVING
    SUM(CASE WHEN value = 1 AND field_id = 11 THEN 1 ELSE 0 END) > 0 AND
    SUM(CASE WHEN value = 1 AND field_id = 12 THEN 1 ELSE 0 END) > 0;

Answer 2

尝试此sql从temp中选择DISTINCT user_id，其中value = 1和（field_id = 12或field_id = 11）

Answer 3

您还可以使用where子句：

select user_id
from table t
where value = 1 and field_id in (11, 12)
group by user_id
having count(distinct field_id) = 2;