SQL - 同一列上的不同条件

发布于 2025-01-13 07:36:01 字数 485 浏览 0 评论 0原文

区别在于我想要两个单独的 WHERE 条件：

 WHERE tag_id IN (1,2)
 OR tag_id IN (3,2)
 GROUP BY other_id HAVING COUNT(tag_id) = 2

这为我提供了我需要的所有记录，而且还为我提供了具有标签 1 或 3 的记录，即使该记录没有tag_id = 2。我知道我的问题出在 OR 条件下，因为如果我分别执行 (1,2) 和 (3,2) ，我获取每个查询的预期结果。

我缺少什么？

原文

I'm trying to achieve something very similar to SQL - Multiple conditions where clause the same column

The difference is that I want two separate WHERE conditions:

 WHERE tag_id IN (1,2)
 OR tag_id IN (3,2)
 GROUP BY other_id HAVING COUNT(tag_id) = 2

This gives me all the records that I need, but also gives me records that have the tags 1 or 3 even when that record doesn't have tag_id = 2. I know that my problem is in the OR condition, because if I do (1,2) and (3,2) separately, I get the expected results for each query.

What am I missing?

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迷你仙 2025-01-20 07:36:01

你可以使用：

SELECT other_id
FROM yourTable
GROUP BY other_id
HAVING COUNT(tag_id) = 2 AND              -- 2 tags
       (SUM(tag_id NOT IN (1, 2)) = 0 OR  -- either (1, 2)
        SUM(tag_id NOT IN (3, 2)) = 0);   -- or (3, 2)

You could use:

SELECT other_id
FROM yourTable
GROUP BY other_id
HAVING COUNT(tag_id) = 2 AND              -- 2 tags
       (SUM(tag_id NOT IN (1, 2)) = 0 OR  -- either (1, 2)
        SUM(tag_id NOT IN (3, 2)) = 0);   -- or (3, 2)

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