我是新发布,但社区已成为我迄今为止项目中的最佳资源。 我是一个愚蠢的/虚拟的Mysql“想成为”,我正处在一个让我发疯的项目中。如何合并具有相同id的多个行mysql
我有一个wordpress plugin buddypress的表,它将meta_key和meta_values配对,以创建类似于分类的东西。我的职责是使用这些配对值来实现高级组搜索。这里是原来的表:
--------------------------------------------
id | group_id | meta_key | meta_value
--------------------------------------------
1 | 1 | time-zone | Kwajalein
2 | 1 | playstyle | hardcore
3 | 1 | recruiting-status | Open
4 | 1 | ilvl | 115
5 | 1 | main-raid | Final Coil of Bahamut
6 | 1 | voicechat | fc.teamspeak3.com
等....
使用视图我设法创造begginers一个更友好的检索表:
gid| time-zone| playstyle | main-raid
--------------------------------------------
1 | | |
1 |Kwajalein | |
1 | | hardcore |
1 | | |
1 | | | Final Coil of Bahamut
1 | | |
这里是查看代码:
SELECT distinct
group_id AS 'gid',
IF(meta_key='recruiting-status',meta_value,'') AS 'Recruitment',
IF(meta_key='server',meta_value,'') AS 'server',
IF(meta_key='time-zone',meta_value,'') AS 'tzone',
IF(meta_key='main-raid',meta_value,'') AS 'raid',
IF(meta_key='raid-days',meta_value,'') AS 'days',
IF(meta_key='playstyle',meta_value,'') AS 'playstyle',
IF(meta_key='raid-progression',meta_value,'') AS 'progression',
IF(meta_key='raid-time',meta_value,'') AS 'time',
IF(meta_key='tanker-spot',meta_value,'') AS 'tank',
IF(meta_key='healer-spot',meta_value,'') AS 'healer',
IF(meta_key='melee-dps-spot',meta_value,'') AS 'melee',
IF(meta_key='ranged-dps-spot',meta_value,'') AS 'ranged',
IF(meta_key='magic-dps-spot',meta_value,'') AS 'magic',
IF(meta_key='ilvl',meta_value,'') AS 'ilvl',
IF(meta_key='voicechat',meta_value,'') AS 'voice',
IF(meta_key='voicechatpass',meta_value,'') AS 'voicep',
FROM wpstatic_bp_groups_groupmeta
的一点是,我需要合并该结果(图),以便所有的GROUP_ID = 1或2或3等站在一个单列,像这样:
gid| time-zone| playstyle | main-raid
--------------------------------------------
1 |Kwajalein | hardcore | Final Coil of Bahamut
2 |SaoPaulo | regular | Second Coil of Bahamut
等
任何人都可以帮助我吗?
这是类似于此http://stackoverflow.com/questions/16568228/how-to-transpose-mysql-table-rows-into-columns但我认为你可以添加到年底你认为'GROUP BY gid'可能吗? – 2015-02-05 20:21:01
我试了一下,除了gid列以外没有任何数据。 – 2015-02-06 11:08:20