Question

拥有以下代码：

SELECT a.*
 , tb_media.filename
 , tb_galleries.name
 , tb_media_iptc.description
 , tb_media_iptc.title
 , tb_media_iptc.headline
 , tb_folders.name
FROM

我无法对colum名称（不是我的数据库设计）做什么，我如何区分结果中名为'name'的两个列？

Answer 1

您应该为任何具有相同名称的列提供别名：

SELECT a.*
 , tb_media.filename
 , tb_galleries.name as Name1
 , tb_media_iptc.description
 , tb_media_iptc.title
 , tb_media_iptc.headline
 , tb_folders.name as Differentname
FROM

Answer 2

你应该使用别名 -

SELECT a.*
 , tb_media.filename
 , tb_galleries.name AS gallery_name
 , tb_media_iptc.description
 , tb_media_iptc.title
 , tb_media_iptc.headline
 , tb_folders.name AS folder_name
FROM

关键字 AS 可能会被省略 - tb_galleries.name gallery_name

Answer 3

使用AS时，只需在查询中为其提供备用列名。

示例：

SELECT a.*
 , tb_media.filename
 , tb_galleries.name AS 'tb_g_name'
 , tb_media_iptc.description
 , tb_media_iptc.title
 , tb_media_iptc.headline
 , tb_folders.name AS 'tb_f_name'
FROM

Answer 4

SELECT a.*
 , tb_media.filename
 , tb_galleries.name AS name_1
 , tb_media_iptc.description
 , tb_media_iptc.title
 , tb_media_iptc.headline
 , tb_folders.name AS name_2

Answer 5

SELECT a.*
 , tb_media.filename
 , tb_galleries.name as Name1
 , tb_media_iptc.description
 , tb_media_iptc.title
 , tb_media_iptc.headline
 , tb_folders.name as Name2
FROM

Answer 6

您可以使用列别名来区分名称。

       Have the following code:

       SELECT a.*
       , tb_media.filename
       , tb_galleries.name  as gallery_name ---(or whatever name u want)
       , tb_media_iptc.description
       , tb_media_iptc.title
       , tb_media_iptc.headline
       , tb_folders.name as folder_name ---(or whatever name u want)
       FROM

Answer 7

您可以使用AS关键字：

SELECT a.*
 , tb_media.filename
 , tb_galleries.name AS galleryName
 , tb_media_iptc.description
 , tb_media_iptc.title
 , tb_media_iptc.headline
 , tb_folders.name AS foldersName
FROM

这将更改列的显示名称...

来自不同表的列具有相同的名称

7 个答案: