Redis - Keys

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Redis keys commands are used for managing keys in Redis. Following is the syntax for using redis keys commands.

Syntax

redis 127.0.0.1:6379> COMMAND KEY_NAME

Example

redis 127.0.0.1:6379> SET howcodex redis 
OK 
redis 127.0.0.1:6379> DEL howcodex 
(integer) 1

In the above example, DEL is the command, while howcodex is the key. If the key is deleted, then the output of the command will be (integer) 1, otherwise it will be (integer) 0.

Redis Keys Commands

Following table lists some basic commands related to keys.

Sr.No Command & Description
1 DEL key

This command deletes the key, if it exists.
2 DUMP key

This command returns a serialized version of the value stored at the specified key.
3 EXISTS key

This command checks whether the key exists or not.
4 EXPIRE key seconds

Sets the expiry of the key after the specified time.
5 EXPIREAT key timestamp

Sets the expiry of the key after the specified time. Here time is in Unix timestamp format.
6 PEXPIRE key milliseconds

Set the expiry of key in milliseconds.
7 PEXPIREAT key milliseconds-timestamp

Sets the expiry of the key in Unix timestamp specified as milliseconds.
8 KEYS pattern

Finds all keys matching the specified pattern.
9 MOVE key db

Moves a key to another database.
10 PERSIST key

Removes the expiration from the key.
11 PTTL key

Gets the remaining time in keys expiry in milliseconds.
12 TTL key

Gets the remaining time in keys expiry.
13 RANDOMKEY

Returns a random key from Redis.
14 RENAME key newkey

Changes the key name.
15 RENAMENX key newkey

Renames the key, if a new key doesn't exist.
16 TYPE key

Returns the data type of the value stored in the key.
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