May 16, 2021 Redis
The Redis key command is used to manage the keys of the redis.
The basic syntax of the Redis key command is as follows:
redis 127.0.0.1:6379> COMMAND KEY_NAME
redis 127.0.0.1:6379> SET w3ckey redis OK redis 127.0.0.1:6379> DEL w3ckey (integer) 1
In the above example, DEL is a command and w3ckey is a key. If the key is removed successfully, the command executes after output (integer) 1, otherwise output (integer) 0
The following table gives the basic commands related to the Redis key:
| Serial number | Commands and descriptions |
|---|---|
| 1 |
DEL key
This command is used to remove key when it exists. |
| 2 |
DUMP key
Serialize a given key and return the serialized value. |
| 3 |
EXISTS key
Check for the existence of a given key. |
| 4 |
EXPIRE key
seconds
Set an expiration time for a given key. |
| 5 |
EXPIREAT key timestamp
EXPIREAT serves a similar purpose to EXPIRE and is used to set an expiration time for key. The difference is that the time parameter accepted by the EXPIREAT command is the UNIX timestamp. |
| 6 |
PEXPIRE key milliseconds
Set the expiration time of key in milliseconds. |
| 7 |
PEXPIREAT key milliseconds-timestamp
Set the timestamp for the key expiration time (unix timestamp) in milliseconds |
| 8 |
KEYS pattern
Find all keys that match a given pattern. |
| 9 |
MOVE key db
Move the key of the current database to a given database db. |
| 10 |
PERSIST key
Remove the expiration time of the key, and the key will persist. |
| 11 |
PTTL key
Returns the remaining expiration time of key in milliseconds. |
| 12 |
TTL key
Returns the remaining time of life (TTL, time to live) for a given key in seconds. |
| 13 |
RANDOMKEY
A key is returned randomly from the current database. |
| 14 |
RENAME key newkey
Modify the name of the key |
| 15 |
RENAMENX key newkey
Change the key name to newkey only if newkey does not exist. |
| 16 |
TYPE key
Returns the type of value that key stores. |
For more commands, please refer to: http://redis.readthedocs.org/en/latest/index.html