Redis Sorted Sets

Redis sorted set is a sorted list of unique values used to store sets data structure in Redis under a key. I this lesson I will show the commands of the Redis sorted sets.

ZADD command is used to create a new set or add an item at the set:

Syntax:

ZADD key score1 value1 score2 value2 ...

Example:

ZADD names 1 Jone
ZADD names 2 Mamun
ZADD names 4 Sarkar 3 Khan

 

Some Other Commands of Sets:

Commands Description	Syntax	Example
Adding elements to the sorted set	ZADD key score1 value score2 value	ZADD names 4 Sarkar 3 Khan
Getting the number of members of a sorted set	ZCARD key	ZCARD names
Getting members within a range	ZRANGE key start stop	ZRANGE names 0 7
Getting all members	ZRANGE key 0 -1	ZRANGE names 0 -1
Getting all members with score	ZRANGE key 0 -1 WITHSCORES	ZRANGE names 0 -1 WITHSCORES
Increment score of a member	ZINCRBY KEY INCREMENT MEMBER	ZINCRBY names 2 Jone
Getting elements by score range	ZRANGEBYSCORE key min max [WITHSCORES] [LIMIT]	ZRANGEBYSCORE names 3 5
		ZRANGEBYSCORE names 3 5 WITHSCORES
		ZRANGEBYSCORE names 3 7 WITHSCORES LIMIT 0 2
Getting the index of a value	ZRANK key member	ZRANK names Khan
Remove members from sorted set	ZREM key member1 member2 .....	ZREM names Khan
Delete all members within the range	ZREMRANGEBYRANK key start stop	ZREMRANGEBYRANK names 0 2
Delete all member within range	ZREMRANGEBYSCORE key min max	ZREMRANGEBYSCORE names 0 2
Getting value on descending order	ZREVRANGE key start stop [WITHSCORES]	ZREVRANGE names 0 -1
		ZREVRANGE names 0 -1 WITHSCORES
Getting score of a member	ZSCORE key member	ZSCORE names Jone