Question

这是我要执行的查询，但没有任何结果，如果您需要更多有关此方面的信息，请在下面的评论中提问，我将不胜感激。

SELECT DISTINCT * FROM users WHERE ( (height BETWEEN "139" AND "170" AND language = "english") AND (active = "1" AND gender IN (4525,4526) AND DATEDIFF(CURDATE(), birthday)/365 >= "22" AND DATEDIFF(CURDATE(), birthday)/365 <= "55" AND country = "IT") AND id NOT IN (SELECT block_userid FROM blocks WHERE user_id = 1) AND id NOT IN (SELECT like_userid FROM likes WHERE user_id = 1) AND id NOT IN (SELECT user_id FROM likes WHERE like_userid = 1) AND id <> "1" ) ORDER BY xlikes_created_at DESC,xvisits_created_at DESC,xmatches_created_at DESC,is_pro DESC LIMIT 12 OFFSET 0;

我尝试了OR运算符，但当然我不是在寻找OR，我希望所有条件都成立，然后再求结果。

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Answer 1

为什么需要与众不同？通常用户是唯一的

SELECT DISTINCT * FROM `users`

不要将数字值另存为字符串

`height` BETWEEN "139" AND "170"

您的性别状况反复出现：我不想听起来不敏感，但是这些性别很多。

`gender` IN (4525,4526,1275,1277,1278,1279,1280,1281,1282,1283)

您有2个日期差，第二个没有比较器。 Datediff还会返回数字值而不是字符串

DATEDIFF(CURDATE(), `birthday`)/365 >= "24"
DATEDIFF(CURDATE(), `birthday`)/365  "16"

现在，如果DATEDIFF上缺少的运算符不能解决问题。直接进入数据库，删除所有条件，并开始一个一个地添加这些条件，直到发现哪个原因返回0行。

使用AND运算符，不同的查询未给出任何结果

1 个答案: