SET and GET commands in Redis

Introduction

SET and GET commands let you save and find simple pieces of information quickly in Redis.

You want to remember a user's name after they log in.

You need to store a temporary code for verifying a phone number.

You want to save a small setting or preference for an app.

You want to quickly retrieve a value without searching through big data.

You want to cache a result to make your app faster.

Syntax

Redis

SET key value
GET key

SET saves a value with a name (key).

GET retrieves the value using the key.

Examples

Saves the name "alice" under the key "username" and then gets it.

Redis

SET username "alice"
GET username

Saves a session token and retrieves it later.

Redis

SET session_token "abc123"
GET session_token

Stores a favorite color and fetches it.

Redis

SET color "blue"
GET color

Sample Program

This saves the message "Hello, world!" with the key "greeting" and then retrieves it.

Redis

SET greeting "Hello, world!"
GET greeting

Important Notes

If you GET a key that does not exist, Redis returns (nil) (no value).

SET will overwrite the value if the key already exists.

Keys and values are usually strings in Redis.

Summary

SET saves a value with a key.

GET fetches the value by key.

These commands are simple and fast for storing small pieces of data.