String Commands

String commands are the most basic data type commands, which can store strings, integers, or floating-point numbers. Strings can store up to 512 MB of data.

Command List

APPEND

If the key already exists and is a string, appends the value to the end of the key

BITCOUNT

Counts the number of set bits (population counting) in a string

BITOP

Performs bitwise operations between strings and stores the result in a destination key

DECR

Decrements the numeric value stored in the key by one

DECRBY

Decrements the numeric value stored in the key by the specified value

GET

Gets the value of the specified key

GETBIT

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

GETRANGE

Returns a substring of the string value in the key

GETSET

Sets the value of the given key to a new value and returns the old value of the key

INCR

Increments the numeric value stored in the key by one

INCRBY

Increments the numeric value stored in the key by the specified value

INCRBYFLOAT

Increments the numeric value stored in the key by the specified float value

MGET

Gets the values of all given keys

MSET

Sets one or more key-value pairs simultaneously

MSETNX

Sets the given keys to their respective values only if all the keys do not exist

SET

Sets the value of the specified key

SETBIT

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

SETEX

Sets the value of a key with expiration time in seconds

PSETEX

Sets the value of a key with expiration time in milliseconds

SETNX

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

SETRANGE

Overwrites part of the string stored at key, starting at the specified offset, with the given value

STRLEN

Returns the length of the string value stored in the key

Use Cases

String commands are the most commonly used data type commands, suitable for various scenarios such as caching, counters, and distributed locks. Counter functionality can be easily implemented through INCR and DECR series commands.

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