Redis Sorted Sets

Redis Sorted Sets are similar to Redis Sets but the first one has the unique feature of values stored. It means every member of a Sorted Set is associated with a score which can be used to take the sorted set ordered, from the smallest to the greatest score.

Example

redis 127.0.0.1:6379> ZADD javatpoint 1 redis
(integer) 0
redis 127.0.0.1:6379> ZADD javatpoint 2 cassandra
(integer) 1
redis 127.0.0.1:6379> ZADD javatpoint 3 cassandra
(integer) 0
redis 127.0.0.1:6379> ZADD javatpoint 3 mysql
(integer) 1
redis 127.0.0.1:6379> ZADD javatpoint 4 mysql
(integer) 0
redis 127.0.0.1:6379> ZRANGE javatpoint 0 10 WITHSCORES
1) "redis"
2) "1"
3) "cassandra"
4) "3"
5) "mysql"
6) "4"

Redis Sorted Sets Commands

Following is a list of commands used in sorted sets.

Index	Commands	Description
1	ZADD key score1 member1 [score2 member2]	It is used to add one or more members to a sorted set, or updates its score, if it already exists
2	ZCARD key	It is used to get the number of members in a sorted set
3	ZCOUNT key min max	It is used to count the members in a sorted set with scores within the given values
4	ZINCRBY key increment member	It is used to increment the score of a member in a sorted set
5	ZINTERSTORE destination numkeys key [key ...]	It is used to intersect multiple sorted sets and stores the resulting sorted set in a new key
6	ZLEXCOUNT key min max	It is used to count the number of members in a sorted set between a given lexicographical range
7	ZRANGE key start stop [WITHSCORES]	It is used to return a range of members in a sorted set, by index
8	ZRANGEBYLEX key min max [LIMIT offset count]	It is used to return a range of members in a sorted set, by lexicographical range
9	ZRANGEBYSCORE key min max [WITHSCORES] [LIMIT]	It is used to return a range of members in a sorted set, by score
10	ZRANK key member	It is used to determine the index of a member in a sorted set
11	ZREM key member [member ...]	It is used to remove one or more members from a sorted set
12	ZREMRANGEBYLEX key min max	It is used to remove all members in a sorted set between the given lexicographical range
13	ZREMRANGEBYRANK key start stop	It is used to remove all members in a sorted set within the given indexes
14	ZREMRANGEBYSCORE key min max	It is used to remove all members in a sorted set within the given scores
15	ZREVRANGE key start stop [WITHSCORES]	It is used to return a range of members in a sorted set, by index, with scores ordered from high to low
16	ZREVRANGEBYSCORE key max min [WITHSCORES]	It is used to return a range of members in a sorted set, by score, with scores ordered from high to low
17	ZREVRANK key member	It is used to determine the index of a member in a sorted set, with scores ordered from high to low
18	ZSCORE key member	It is used to retrieve the score associated with the given member in a sorted set
19	ZUNIONSTORE destination numkeys key [key ...]	It is used to add multiple sorted sets and stores the resulting sorted set in a new key
20	ZSCAN key cursor [MATCH pattern] [COUNT count]	It is used to incrementally iterates sorted sets elements and associated scores