How to Retrieve Columns Corresponding to the Maximum Value in a Database Query?

Retrieving Column Values Corresponding to Maximum Value

When querying a database, it can be necessary to extract data from multiple columns based on the maximum value of another column. However, a common problem occurs when the result returns the first row's data for the corresponding columns instead of the row matching the maximum value.

To address this issue, one approach is to employ nested queries. The following code shows an alternative solution using the JOIN operator:

SELECT
   s.video_id
   ,s.video_category
   ,s.video_url
   ,s.video_date
   ,s.video_title
   ,s.short_description
FROM videos s
   JOIN (
      SELECT MAX(video_id) AS id
      FROM videos
      GROUP BY video_category
   ) max
   ON s.video_id = max.id

In this query, we use a subquery to find the maximum video_id for each video_category. The JOIN operator is then utilized to join the videos table (s) with the subquery result (max) based on the condition s.video_id = max.id. This ensures that each row returned corresponds to the maximum video_id for its respective video_category.

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