> help $sorted_set
ZADD key [NX|XX] [CH] [INCR] score member [score member ...]
Add one or more members to a sorted set, or update its score if it already exists
ZCARD key
Get the number of members in a sorted set
ZCOUNT key min max
Count the members in a sorted set with scores within the given values
ZINCRBY key increment member
Increment the score of a member in a sorted set
ZINTERSTORE destination numkeys key [key ...] [WEIGHTS weight] [AGGREGATE SUM|MIN|MAX]
Intersect multiple sorted sets and store the resulting sorted set in a new key
ZLEXCOUNT key min max
Count the number of members in a sorted set between a given lexicographical range
ZRANGE key start stop [WITHSCORES]
Return a range of members in a sorted set, by index
ZRANGEBYLEX key min max [LIMIT offset count]
Return a range of members in a sorted set, by lexicographical range
ZRANGEBYSCORE key min max [WITHSCORES] [LIMIT offset count]
Return a range of members in a sorted set, by score
ZRANK key member
Determine the index of a member in a sorted set
ZREM key member [member ...]
Remove one or more members from a sorted set
ZREMRANGEBYLEX key min max
Remove all members in a sorted set between the given lexicographical range
ZREMRANGEBYRANK key start stop
Remove all members in a sorted set within the given indexes
ZREMRANGEBYSCORE key min max
Remove all members in a sorted set within the given scores
ZREVRANGE key start stop [WITHSCORES]
Return a range of members in a sorted set, by index, with scores ordered from high to low
ZREVRANGEBYLEX key max min [LIMIT offset count]
Return a range of members in a sorted set, by lexicographical range, ordered from higher to lower strings.
ZREVRANGEBYSCORE key max min [WITHSCORES] [LIMIT offset count]
Return a range of members in a sorted set, by score, with scores ordered from high to low
ZREVRANK key member
Determine the index of a member in a sorted set, with scores ordered from high to low
ZSCAN key cursor [MATCH pattern] [COUNT count]
Incrementally iterate sorted sets elements and associated scores
ZSCORE key member
Get the score associated with the given member in a sorted set
ZUNIONSTORE destination numkeys key [key ...] [WEIGHTS weight] [AGGREGATE SUM|MIN|MAX]
Add multiple sorted sets and store the resulting sorted set in a new key