Key Commands

Key commands are used to manage keys in Redis. These commands allow you to create, delete, check, and modify keys and their attributes, such as expiration time.

Command List

DEL

Deletes the specified key

EXISTS

Checks if one or more given keys exist

EXPIRE

Sets the expiration time for a given key (in seconds)

EXPIREAT

Sets the expiration timestamp for a given key (Unix timestamp in seconds)

KEYS

Finds all keys matching the given pattern

MOVE

Moves the specified key from the current database to the specified database

PERSIST

Removes the expiration time from a given key, making it persistent

PEXPIRE

Sets the expiration time for a given key (in milliseconds)

PEXPIREAT

Sets the expiration timestamp for a given key (Unix timestamp in milliseconds)

PTTL

Similar to the TTL command, but returns the remaining survival time of a key in milliseconds

RANDOMKEY

Randomly returns a key from the current database

RENAME

Renames a key to a new key

RENAMENX

Renames a key to a new key only if the new key does not exist

TTL

Returns the remaining survival time of a key (in seconds)

TYPE

Returns the type of value stored in a key

Use Cases

Key commands are among the most fundamental and important commands in Redis. They are used to manage the lifecycle of keys, including creating, querying, updating, and deleting keys. EXPIRE and TTL related commands are particularly suitable for caching scenarios, where expired data can be automatically cleaned up.

For detailed usage and parameters of each command, please refer to the individual command documentation linked above.