php - MySQL 子查询错误 : SQLSTATE[42S21]:

Question

我正在使用 Yii 1.1.15 并在我的模型中使用 scopes 在我的查询中得到一个重复的列名

function scopes () {
     return array(
          'isUsed'=> array(
                    'alias' => 'd',
                    'join' => 'JOIN `ads` v',
                    'condition'=>'d.is_new="0"',
                    //'group'=>'v.store_id'
            ),
     );
}

它生成这个查询

 SELECT COUNT(*) FROM (
        SELECT * FROM `store` d 
        JOIN `ads` v 
        WHERE ((d.pending!="1") AND (d.is_new="0")) AND (v.store_id IN (6))
    ) sq

Yii 给我这个错误

CDbCommand failed to execute the SQL statement: SQLSTATE[42S21]: Column already exists: 1060 Duplicate column name 'id'. The SQL statement executed was: SELECT COUNT(*) FROM (
        SELECT * FROM `store` d 
        JOIN `ads` v 
        WHERE ((d.pending!="1") AND (d.is_new="0")) AND (v.store_id IN (6))
    ) sq 

知道谁来解决这个问题吗？谢谢

Answer 1

这是因为您的子查询中的列不明确。
您应该在子查询中使用特定的列名而不是 *。

请引用下面的例子:

SELECT COUNT(*) FROM (
        SELECT d.columnName,v.columnName,.... FROM `store` d 
        JOIN `ads` v 
        WHERE ((d.pending!="1") AND (d.is_new="0")) AND (v.store_id IN (6))
    ) sq