我试图从查询中获得最后3行,但我一直得到这个错误:
SQLSTATE[42S21]: Column already exists: 1060
请告诉我,我哪里做错了?$sql = "SELECT * FROM (SELECT i.*, m.*, p.* FROM message i JOIN
members m ON m.id = i.sender_id JOIN profile_photos p
ON p.member_id = m.id WHERE (receiver_id = :receive
AND sender_id = :sent OR receiver_id = :sent AND sender_id = :receive)
ORDER BY date DESC LIMIT 3) t ORDER BY date ASC";
您可能已经在多个表中有ID
列,并选择语句SELECT i.*, m.*, p.*
列出它们。
选择您想要的特定列,例如
SELECT i.id, i.col1, m.col2, p.col3 ...
或者,使用像
这样的列别名SELECT i.id as IID, m.*, p.id as PID