我如何在MySQL中合并重复的行？

Question

我正在处理一个项目，每个组织都有障碍，每个组织可能包含一个或多个障碍，然后我需要生成一个XML文件，显示组织中的每个障碍。

但是执行这个sql代码：

SELECT organizations.*, barriers.barrierName AS bname, barriers.type AS btype, geographs.name AS geo, rpd.rpdname AS rpdn, rpd.meaning AS rpdmean FROM organizations 
left join orgbarriers on orgbarriers.idOrg = organizations.id 
left join barriers on orgbarriers.idBarrier = barriers.id 
left join orggeographs on organizations.id = orggeographs.idOrg 
left join geographs on geographs.id = orggeographs.idGeo
left join orgrpds on orgrpds.idOrg = organizations.id
left join rpd on rpd.id = orgrpds.idRPD

我得到了像这张图片一样的重复行：

Answer 1

使用关键字＆＃34; DISTINCT＆＃34;

SELECT DISTINCT rest of your query