加入mysql需要为每个主键返回单个记录

Question

我有两个属性和图像表，它们具有相同的列名，如两个表中的id，name。父列是图像中的外键。

SELECT DISTINCT(A.id),A.name,B.name AS img 
FROM `jos_properties_products` AS A
LEFT JOIN `jos_properties_images` AS B ON A.id = B.parent

从上面我想删除重复。

Answer 1

试试这个：

 SELECT A.id,A.name,max(B.name) AS img 
FROM `jos_properties_products` AS A
LEFT JOIN `jos_properties_images` AS B ON A.id = B.parent
group by A.id,A.name

Answer 2

SELECT DISTINCT（A.id）as ids，A.name aName，B.name AS img 来自jos_properties_products AS A LEFT JOIN jos_properties_images AS B ON A.id = B.parent group by ids，aName，img;

我认为这样做