Question

概述：

有2张桌子
使用两个表格中的entry_id（这可以）加入它们
将这些结果存储在tableStore中
然后在tableStore中将这些值按field_id_13

CODE：

SELECT * FROM 
    (SELECT * FROM
        (SELECT *  
            FROM exp_channel_data 
            LEFT JOIN exp_channel_titles 
            ON exp_channel_data.entry_id = exp_channel_titles.entry_id 
            WHERE field_id_13 > '1' 
            ORDER BY field_id_13 
            ASC LIMIT 6
    ) AS tableStore) 
AS tableStore 
ORDER BY field_id_13 DESC

错误： - ＆＃34;重复列名称＆＃39; entry_id＆＃39;＆＃34;

问题： - 我如何修复上面的代码，以便错误不会发生？

Answer 1

我将废除所有无关的嵌套，而是将其简单地写为：

SELECT * FROM (
                SELECT ecd.entry_id,
                       ecd.field_id_13,
                       ecd.field_id_11,
                       ect.title
                FROM exp_channel_data ecd
                LEFT JOIN exp_channel_titles ect
                ON ecd.entry_id = ect.entry_id 
                WHERE ecd.field_id_13 > '1'
                ORDER BY ecd.field_id_13 ASC
                LIMIT 6
              )
ORDER BY field_id_13 desc;

Answer 2

问题是重复列说明其中一个select语句需要更多定义。

    SELECT * FROM 
    (SELECT * FROM
        (SELECT exp_channel_data.entry_id, exp_channel_data.field_id_13, exp_channel_data.field_id_11, exp_channel_titles.title  
        FROM exp_channel_data 
        LEFT JOIN exp_channel_titles 
        ON exp_channel_data.entry_id = exp_channel_titles.entry_id 
        WHERE field_id_13 > '1' 
        ORDER BY field_id_13 
        ASC LIMIT 6
    ) AS tableStore) 
AS tableStore ORDER BY field_id_13 DESC

mysql - 重复的列名

2 个答案: