mysql - 加入mysql需要为每个主键返回单个记录

Question

我有两个用于属性和图像的表，它们在两个表中具有相同的列名，例如 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的。

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 FROM jos_properties_productsAS A LEFT JOIN jos_properties_imagesAS B ON A.id = B.parent group by ids,aName,img;

我认为这会做