Redis is an open-source, BSD-licensed advanced key-value store. It is often referred to as a data structure server since the keys can contain strings, hashes, lists, sets, and sorted sets. Redis is written in C.
Redis is a NoSQL database that follows the principle of a key-value store.
Some commands of Redis.
ZINCRBY: If the member already exists in the sorted set add the increment to its score and update the position of the element in the sorted set accordingly.
ZRANGE: Return the specified elements of the sorted set at the specified key.
ZRANGEBYSCORE: Return all the elements in the sorted set at a key with a score between min and max (including elements with a score equal to min or max).
ZRANK: Returns the rank of member in the sorted set stored at key, with the scores ordered from low to high.
ZREM: ZREM command in redis removes the specified member from the sorted set value stored at the key.
ZREMRANGEBYSCORE: Remove all the elements in the sorted set at a key with a score between min and max (including elements with a score equal to min or max).
ZREVRANGE: Return the specified elements of the sorted set at the specified key.
ZSCORE: Return the score of the specified element of the sorted set at the key.
ZCOUNT: This command counts the members in a sorted set with scores within the given values.
ZINTERSTORE: Intersects multiple sorted sets and stores the resulting sorted set in a new key
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