Compared to other Redis data structures, sets are unique in that they’re unordered and contain only unique values. This makes sets a good choice for certain types of data, such as unique IDs or tags. Other Redis data structures, like lists or sorted sets, have different use cases and performance characteristics. Lists, for example, are ordered and allow for efficient insertion and deletion at either end of the list. Here are some ways in which sets are useful in Redis:

  • Unique item tracking: Sets are useful for tracking unique items, such as user IDs or product IDs. This can be useful for a variety of purposes, such as counting unique visitors to a website or tracking inventory levels.

  • Set operations: Redis provides a variety of set operations, such as union, intersection, and difference, which can be used to perform powerful data manipulations. For example, we can use set operations to find the common items between two sets or remove items from one set that are also present in another set.

Overall, sets are a powerful and versatile data structure in Redis that can be used for a variety of purposes. We’re going to explore the different commands that can be executed when dealing with sets in Redis. We’ll learn the six most commonly used commands to perform set operations, which can be of great help in creating applications with Redis where we want to maintain unique elements only in our Redis data store.

The SADD command

As the name suggests, the SADD command is used to insert data in a set. This command can insert multiple elements and return the number of elements inserted in the current operation.

Syntax and example

The syntax of the SADD command is shown below:

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