Getting row before and after a query

Question

I currently have this query

SELECT  short_url,
        type,
        file_thumbnail,
        file_embed,
        media.id,
        user,
        media.file_u         


        

Answer 1

You could use a union to get the previous and next rows:

SELECT
    ...
FROM info
INNER JOIN media
    ON info.mid = media.id
WHERE media.id < '$id'
GROUP BY mid
ORDER BY media.id DESC
UNION ALL
SELECT
    ...
FROM info
INNER JOIN media
    ON info.mid = media.id
WHERE media.id = '$id'
GROUP BY mid
ORDER BY media.id DESC
UNION ALL
SELECT
    ...
FROM info
INNER JOIN media
    ON info.mid = media.id
WHERE media.id > '$id'
GROUP BY mid
ORDER BY media.id ASC

However, if your user will want to see the previous item or next item each time they navigate, then you're still going to hit the database to get the next item in whatever direction they're navigating.

I would recommend pulling a page at a time, and navigating through it on the front end instead.