Gain insights into Redis's capabilities as a database, cache, and message broker. Delve into commands, transactions, and clustering. Explore flexibility, security, and data structure support with Redis.

Redis.tar.gz

Redis is an open-source, in-memory data structure store used as a database, cache, and message broker. Unlike Memcached, it supports multiple data types, giving a lot of flexibility to the user. Redis is easy to configure and provides clustering support to store data in multiple servers.

In this course, you will learn about the various commands that you can use to store different types of data structures in Redis. Some of those commands include utility, insertion, and modification commands.

You will also become familiar with different aspects of Redis, such as transactions, security, partitioning, and clustering. In all, this is your go-to guide to Redis.

Complete Guide to Redis

# `SUNION` command
As the name suggests, the `SUNION` command is used to find the union of two or more sets.
>SUNION *key1 key2 key3 ..*

In the example below, we have found the union of the **fruits** and **fruits1** keys.

![](/api/collection/6650775272947712/6601946975698944/page/6268907158503424/image/5893984967720960)

# `SREM` command
If we need to remove some elements from the set, then we can use `SREM` command.

> SREM *key value1 value2 ..*

In the example below, we are removing apple from our fruits set. When the command is executed, 1 is returned, which indicates that one fruit was removed.

![](/api/collection/6650775272947712/6601946975698944/page/6268907158503424/image/6355820238340096)

We can also remove multiple values using this command.

# `SPOP` command
This command is used to remove a random value from the set. We can remove one or more random values.

> SPOP *key count*

In the example below, we are removing one random value. When the command is executed, it returns the name of the value that was removed.

![](/api/collection/6650775272947712/6601946975698944/page/6268907158503424/image/4942872232067072)

# `SMOVE` command
The `SMOVE` command is used to move a value from one set to another.

Currently, we have two sets, i.e., **fruits** and **fruits1**. The elements in each of these sets are shown below.

![](/api/collection/6650775272947712/6601946975698944/page/6268907158503424/image/5028109079281664)

We will move the fruit from one set to another using the `SMOVE` command.

>SMOVE *source dest member*

![](/api/collection/6650775272947712/6601946975698944/page/6268907158503424/image/5909229538902016)

Learn how to modify data in  a Set in Redis

Let's Begin

Redis Commands

Redis Advanced Concepts

Redis Cluster

Appendix

Storing Set in Redis: Modification Commands

`SUNION` command

Storing Set in Redis: Modification Commands

SUNION command

`SUNION` command