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照片:id、uid、日期;

好友:uid1、uid2、日期、状态;

我想为用户的朋友展示最新的照片。我该怎么办?

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2 回答 2

2

这将做到:

SELECT p.id
FROM Photos AS p, Friends AS f
WHERE p.uid = f.uid2 AND f.uid1 = ${userX.id}
ORDER BY p.date DESC
LIMIT 1;
于 2011-03-25T16:29:53.823 回答
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SELECT id FROM photos WHERE uid IN (SELECT uid2 FROM friends WHERE uid1 = {$uid1} ORDER BY date DESC LIMIT 1);

我认为 UID1 是用户,UID2 是朋友,这将检索所有 ID

于 2011-03-25T16:26:54.887 回答