DECRBY key decrement
相关命令
- APPEND
- BITCOUNT
- BITOP
- BITPOS
- DECR
- DECRBY
- GET
- GETBIT
- GETRANGE
- GETSET
- INCR
- INCRBY
- INCRBYFLOAT
- MGET
- MSET
- MSETNX
- PSETEX
- SET
- SETBIT
- SETEX
- SETNX
- SETRANGE
- STRLEN
始于1.0.0可用。
时间复杂度: O(1)
Decrements the number stored at key
by decrement
. If the key does not exist, it is set to 0
before performing the operation. An error is returned if the key contains a value of the wrong type or contains a string that can not be represented as integer. This operation is limited to 64 bit signed integers.
See INCR for extra information on increment/decrement operations.
返回值
Integer reply: the value of key
after the decrement
例子
redis> SET mykey "10"
- OK
redis> DECRBY mykey 3
(integer) 7
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