How to Implement Conditional Queries and Pagination in Redis

Redis Pagination with Sorted Sets

Redis Sorted Sets (ZSet) store members together with a numeric score that defines the ordering. By using a sortable attribute such as a timestamp as the score, pagination can be performed with range queries.

ZADD ZADD key score member [score member ...] – add a member with its score.

ZREVRANGE ZREVRANGE key start stop – retrieve members in reverse order for page start to stop.

ZREM ZREM key member – delete a member (e.g., remove a comment).

Typical workflow:

# Insert a new item (e.g., a comment) with its creation time as score
ZADD comments 1672531200 "comment:123"

# Retrieve page 2 with 10 items per page (items 10‑19)
ZREVRANGE comments 10 19

Sorted Sets maintain order automatically and support score‑based filtering, making them preferable to Lists for pagination.