Syntax
DECRBY key decrement
Decrements the number stored
at key by decrement.
Returns
Returns the value of key after
the decrement.
127.0.0.1:6379> set var 100 OK 127.0.0.1:6379> decrby var 15 (integer) 85 127.0.0.1:6379> get var "85"
This operation is limied to 64
bit signed integers, so if you try to perform on more than 64-bit
numbers, it throws "out of range" error.
127.0.0.1:6379> set var 12345678909876543212345789 OK 127.0.0.1:6379> decrby var 15 (error) ERR value is not an integer or out of range
This operation performs on
strings that can convert to integers, else error thrown.
127.0.0.1:6379> set var hari OK 127.0.0.1:6379> decrby var 15 (error) ERR value is not an integer or out of range
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