Redis Hincrby Command
The Redis Hincrby command is used to increment the value of a field in a hash by a specified increment value.
The increment can also be negative, which is equivalent to performing a subtraction operation on the specified field.
If the key for the hash does not exist, a new hash is created and the HINCRBY command is executed.
If the specified field does not exist, its value is initialized to 0 before the command is executed.
Executing the HINCRBY command on a field that stores a string value will result in an error.
The value of this operation is limited to a 64-bit signed number.
Syntax
The basic syntax for the redis Hincrby command is as follows:
redis 127.0.0.1:6379> HINCRBY KEY_NAME FIELD_NAME INCR_BY_NUMBER
Available Versions
= 2.0.0
Return Value
The value of the field in the hash after the HINCRBY command is executed.
Example
redis> HSET myhash field 5
(integer) 1
redis> HINCRBY myhash field 1
(integer) 6
redis> HINCRBY myhash field -1
(integer) 5
redis> HINCRBY myhash field -10
(integer) -5
redis>