May 16, 2021 Redis
The relevant commands for the Redis string data type are used to manage the redis string values, with the following basic syntax:
redis 127.0.0.1:6379> COMMAND KEY_NAME
In the above example we used the SET and GET commands, with the key w3ckey.
The following table lists commonly used redis string commands:
| Serial number | Commands and descriptions |
|---|---|
| 1 |
SET key value
Set the value of the specified key |
| 2 |
GET key
Gets the value of the specified key. |
| 3 |
GETRANGE key start end
Returns sub-characters of string values in key |
| 4 |
GETSET key value
Set the value of a given key to value and return the old value of the key. |
| 5 |
GETBIT key offset
For the string value stored by key, get the bit on the specified offset. |
| 6 |
MGET key1 [key2..]
Gets all (one or more) values for a given key. |
| 7 |
SETBIT key offset value
Set or clear bits on a specified offset for the string value stored by key. |
| 8 |
SETEX key seconds value
Associate the value value to key and set the key's expiration time to seconds. |
| 9 |
SETNX key value
Set the value of key only if it does not exist. |
| 10 |
SETRANGE key offset value
Overwrides the value of the string stored by a given key with the value parameter, starting with offset offset. |
| 11 |
STRLEN key
Returns the length of the string value stored by key. |
| 12 |
MSET key value [key value ...]
Set one or more key-value pairs at the same time. |
| 13 |
MSETNX key value [key value ...]
Set one or more key-value pairs at the same time, when and only if all given keys do not exist. |
| 14 |
PSETEX key milliseconds value
This command is similar to the SETEX command, but it sets the lifetime of key in milliseconds instead of seconds, as the SETEX command does. |
| 15 |
INCR key
Add one value to the number stored in key. |
| 16 |
INCRBY key increment
Add the value stored by key to the given incremental value. |
| 17 |
INCRBYFLOAT key increment
Add the value stored by key to the given floating-point increment. |
| 18 |
DECR key
Reduce the value of the number stored in key by one. |
| 19 |
DECRBY key decrement
The value stored by key minus the given decrement. |
| 20 |
APPEND key value
If the key already exists and is a string, the APPEND command appends value to the end of the key's original value. |
For more commands, please refer to: http://redis.readthedocs.org/en/latest/index.html