SQL 错误：1267 - 操作 '=' 的排序规则 (utf8_general_ci,IMPLICIT) 和 (utf8_persian_ci,IMPLICIT) 的非法混合

Question

MyBB SQL 错误

MyBB 遇到内部 SQL 错误，无法继续。

SQL 错误：

1267 - Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8_persian_ci,IMPLICIT) for operation '='

查询：

SELECT t.*
    ,t.subject AS threadsubject
    ,u.username
    ,u.usergroup
    ,u.displaygroup
    ,i.*
    ,i.NAME AS iconname
    ,t.dateline AS threaddate
    ,t.lastpost AS threadlastpost
FROM mybb_threads t
LEFT JOIN mybb_icons i ON (i.iid = t.icon)
LEFT JOIN mybb_users u ON (t.lastposter = u.username)
WHERE t.visible = '1'
    AND t.uid = '54445'
GROUP BY t.tid
ORDER BY threadlastpost DESC LIMIT 5

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Answer 1

检查Ross Smith II的解决方案。他写了关于在 sql 语句中定义排序规则的文章。

Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '='