Redis Hincrby Command

Redis Hashes (Hash)

The Redis Hincrby command is used to add a specified increment value to the field value in the hash table.

The increment can also be a negative number, which is equivalent to performing a subtraction operation on the specified field.

If the hash table key does not exist, a new hash table is created and the HINCRBY command is executed.

If the specified field does not exist, the value of the field is initialized to 0 before executing the command.

Executing the HINCRBY command on a field that stores string values will cause an error.

The value of this operation is limited to 64 It is represented by a signed number within the range of bits.

Syntax

The basic syntax of the Redis Hincrby command is as follows:

redis　127.0.0.1:6379> HINCRBY KEY_NAME FIELD_NAME INCR_BY_NUMBER

Available Version

>= 2.0.0

Return Value

The value of the field in the hash table after executing the HINCRBY command.

Online Examples

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>

Redis Hashes (Hash)