谁能告诉我以下mysql查询中的语法错误是什么？
select uf.ufid,u.username,u.usergroup,u.additionalgroups,uf.fid18,uf.,uf. FROM mybb_userfields as uf JOIN mybb_users as u ON uf.ufid=u.uid WHERE (uf.fid18 IS NOT NULL OR uf. IS NOT NULL OR uf. IS NOT NULL) AND (uf.fid18 != '' OR uf. != '' OR uf. != '')
错误报告：
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'uf. FROM mybb_userfields as uf JOIN mybb_users as u ON uf.ufid=u.uid WHERE (uf.f' at line 1
提前致谢
你有几个"uf."的实例会导致问题。正如 Aynber 所提到的，你有这两个实例，但在 sql 代码中还有其他实例。 将字段名称与这些表别名关联后，您应该会看到更好的结果。祝你好运！