Question

我使用以下查询：

$sql = $db->Query("SELECT a.id, a.t_name, a.cpc FROM twitter a LEFT JOIN users b ON b.id = a.user LEFT JOIN followed c ON c.user_id = '".$data['id']."' AND c.site_id = a.id WHERE a.active = '0' AND (b.coins >= a.cpc AND a.cpc >= '2') AND (c.site_id IS NULL AND a.user !='".$data['id']."')".$dbt_value." ORDER BY a.cpc DESC".($site['mysql_random'] == 1 ? ', RAND()' : '')." LIMIT 14");

但我想补充一下：

AND (a.d_max > '0' OR a.d_max = u) AND (a.max > '0' OR a.max = u)

所以我把它添加到：

$sql = $db->Query("SELECT a.id, a.t_name, a.cpc FROM twitter a LEFT JOIN users b ON b.id = a.user LEFT JOIN followed c ON c.user_id = '".$data['id']."' AND c.site_id = a.id WHERE a.active = '0' AND (a.d_max > '0' OR a.d_max = u) AND (a.max > '0' OR a.max = u) AND (b.coins >= a.cpc AND a.cpc >= '2') AND (c.site_id IS NULL AND a.user !='".$data['id']."')".$dbt_value." ORDER BY a.cpc DESC".($site['mysql_random'] == 1 ? ', RAND()' : '')." LIMIT 14");

但是我收到以下错误：

SQL错误：'where子句'中的未知列'u'：

我知道这应该是如此简单，但我只是错过了，你们能不能发现什么是错的？

Answer 1

应该是这样的

AND (a.d_max > '0' OR a.d_max = 'u') AND (a.max > '0' OR a.max = 'u')

MySQL - 在WHERE CLAUSE中选择未知列

1 个答案: