ZSET¶

similar to hash or dict, but will sort ans manipulate the values (numeric).

By setting all scores to 0 in a ZSET, Redis will sort by member name.

commands

• zadd key score member [score member ...]: add members with scores

• zrem key member [member ...]: remove members, return number of members removed

• zcard key: return number of members

• zincrby key incr member: increase member score

• zcount key min max: return number of members with scores between min and max

• z[rev]rank key member: return member position

• zscore key member: return member score

• z[rev]range key start stop [withscores]: return members and optionally the scores with ranks between start and stop

other commands

• z[rev]rangebyscore key min max [withscores] [limit offset count]: get members with scores between min and max

• zremrangebyrank key start stop: remove members with ranks between start and stop

• zremrangebyscore key min max: remove members with scores between min and max

• zinterstore dest-key nkey key [key ...] [weights weight [weight ...]] [aggregate sum|min|max]: save intersection of zsets to new zset, default sum scores

• zunionstore dest-key nkey key [key ...] [weights weight [weight ...]] [aggregate sum|min|max]: save union of zsets to new zset, default sum scores

zinterstore/zunionstore can also work together with sets by assuming the scores are 1.