Redis - Strings


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Redis strings commands are used for managing string values in Redis. Following is the syntax for using Redis string commands.

Syntax

redis 127.0.0.1:6379> COMMAND KEY_NAME 

Example

redis 127.0.0.1:6379> SET tutorialspoint redis 
OK 
redis 127.0.0.1:6379> GET tutorialspoint 
"redis" 

In the above example, SET and GET are the commands, while tutorialspoint is the key.

Redis Strings Commands

Following table lists some basic commands to manage strings in Redis.

S.No Command & Description
1 SET key value

This command sets the value at the specified key.

2 GET key

Gets the value of a key.

3 GETRANGE key start end

Gets a substring of the string stored at a key.

4 GETSET key value

Sets the string value of a key and return its old value.

5 GETBIT key offset

Returns the bit value at the offset in the string value stored at the key.

6 MGET key1 [key2..]

Gets the values of all the given keys

7 SETBIT key offset value

Sets or clears the bit at the offset in the string value stored at the key

8 SETEX key seconds value

Sets the value with the expiry of a key

9 SETNX key value

Sets the value of a key, only if the key does not exist

10 SETRANGE key offset value

Overwrites the part of a string at the key starting at the specified offset

11 STRLEN key

Gets the length of the value stored in a key

12 MSET key value [key value ...]

Sets multiple keys to multiple values

13 MSETNX key value [key value ...]

Sets multiple keys to multiple values, only if none of the keys exist

14 PSETEX key milliseconds value

Sets the value and expiration in milliseconds of a key

15 INCR key

Increments the integer value of a key by one

16 INCRBY key increment

Increments the integer value of a key by the given amount

17 INCRBYFLOAT key increment

Increments the float value of a key by the given amount

18 DECR key

Decrements the integer value of a key by one

19 DECRBY key decrement

Decrements the integer value of a key by the given number

20 APPEND key value

Appends a value to a key



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