Redis Sorted Sets
Author: Al-mamun Sarkar
Date: 2020-09-21 14:40:16
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 |