Question

请，我有以下oracle查询选择发布并列出附加到帖子的所有共享图像，同时加入用户表和帖子表。我现在的问题是在MySQL中运行此查询。我已经尝试了很多修改，但它一直给我错误，有人可以帮忙吗？

SELECT 
        post_image_id,
        LISTAGG(photo_url, ", ") WITHIN GROUP (ORDER BY photo_url) imgs
        FROM social_post_photos
        GROUP BY post_image_id;

        WITH i AS (
          SELECT post_image_id,
            LISTAGG(photo_url, ", ") WITHIN GROUP (ORDER BY photo_url) imgs
          FROM social_post_photos
          GROUP BY post_image_id
        )  

        SELECT sp.post_body_message, i.imgs AS images
        FROM social_posts sp
        LEFT JOIN vendor_account va
           ON sp.vendor_owner_id = va.eu_vendor_id
        LEFT JOIN i
           ON sp.social_page_id = i.post_image_id

           WHERE sp.social_page_id = 'page1'
           AND sp.vendor_owner_id = 'v100'

表http://sqlfiddle.com/#!9/9c39ef/2的完整演示

Answer 1

listagg的mysql等价物是group_concat -

SELECT 
        post_image_id,
        group_concat(photo_url ORDER BY photo_url) imgs
        FROM social_post_photos
        GROUP BY post_image_id;

在版本8之前，mysql中没有（cte），但我认为你可以在查询中用子查询替换它来创建i。

将oracle转换为mysql以选择listagg并离开join

1 个答案: