Redis Tutorial

• Redis Tutorial
• Redis Introduction
• Redis Installation
• Redis Configuration
• Redis Data Types

Redis Commands

• Redis Commands
• Redis Keys (Key)
• Redis Strings (String)
• Redis Hashes (Hash)
• Redis Lists (List)
• Redis Sets (Set)
• Redis Sorted Sets (Sorted Set)
• Redis HyperLogLog
• Redis Pub/Sub
• Redis Transactions
• Redis Scripting
• Redis Connection
• Redis Server
• Redis GEO
• Redis Stream

Advanced Redis Tutorials

• Redis Backup and Restore
• Redis Security
• Redis Performance Testing
• Redis Client Connection
• Redis Pipelining
• Redis Partitioning
• Java with Redis
• PHP with Redis

Redis EXISTS Command

Redis key (Key)

The Redis EXISTS command is used to check whether a given key exists.

Syntax

The basic syntax for the Redis EXISTS command is as follows:

redis 127.0.0.1:6379> EXISTS KEY_NAME

Available Version

>= 1.0.0

Return Value

Returns 1 if the key exists, otherwise returns 0.

Example

redis 127.0.0.1:6379> EXISTS -new-key
(integer) 0

Now we create a key named -new-key and assign it a value, then use the EXISTS command again.

redis 127.0.0.1:6379> set -new-key newkey
OK
redis 127.0.0.1:6379> EXISTS -new-key
(integer) 1
redis 127.0.0.1:6379>

Redis key (Key)