Redis ZSET is a data structure used in Redis to store sorted sets of data. It is similar to a regular set, but with the added feature of having scores associated with each element. These scores are used to order the elements in the set, and allow for efficient range queries and other operations.
ZSETs are implemented using a combination of a hash table and a skip list. The hash table is used to map elements to their corresponding scores, while the skip list allows for efficient range queries by maintaining a sorted order of the elements.
Some common use cases for ZSETs include leaderboards, rankings, and real-time analytics. They can also be used as an alternative to indexing in relational databases for certain types of queries.
Redis provides various commands for manipulating ZSETs, including adding or removing elements from the set, getting the score of an element, retrieving elements within a score range, and performing operations between multiple ZSETs.
