[英]MySQL Combine 2 rows into one
我有两张桌子:
Item
-------------------------------------
|ID | ImageURLID | BannerImageURLID |
-------------------------------------
| 1 | 1 | 2 |
| 2 | 3 | 4 |
| 3 | 5 | 6 |
-------------------------------------
ImageURL
--------------------------------------
|ID | iOSURL | iOSRetinaURL |
--------------------------------------
| 1 | www.test.at | www.testR.at |
| 2 | www.bann.at | www.bannR.at |
| 3 | www.test.at | www.testR.at |
| 4 | www.bann.at | www.bannR.at |
| 5 | www.test.at | www.testR.at |
| 6 | www.bann.at | www.bannR.at |
--------------------------------------
我希望输出看起来像这样:
-------------------------------------------------------------------------------------
|ID | ImageURLiOS | ImageURLiOSRetina | BannerImageURLiOS | BannerImageURLiOSRetina |
-------------------------------------------------------------------------------------
| 1 | www.test.at | www.testR.at | www.bann.at | www.bannR.at |
| 2 | www.test.at | www.testR.at | www.bann.at | www.bannR.at |
| 3 | www.test.at | www.testR.at | www.bann.at | www.bannR.at |
-------------------------------------------------------------------------------------
我尝试了一些分组和内部联接,但没有什么真正起作用。 是否可以使用SQL实现这一点,还是必须进行一些PHP处理?
select i.id,
u.iOSURL as ImageURLiOS,
u.iOSRetinaURL as ImageURLiOSRetina,
ur.iOSURL as BannerImageURLiOS,
ur.iOSRetinaURL as BannerImageURLiOSRetina
from item i
left join imageurl u on u.id = i.imageurlid
left join imageurl ur on ur.id = i.bannerimageurlid
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