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Redis Related dictionaries

del Translation example syntax

dump Translation example syntax

exists Translation example syntax

expire Translation example syntax

expireat Translation example syntax

keys Translation example syntax

migrate Translation example syntax

move Translation example syntax

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presist Translation example syntax

pexpire Translation example syntax

pexpireat Translation example syntax

pttl Translation example syntax

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type Translation example syntax

scan Translation example syntax

bitcount Translation example syntax

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incrbyfloat Translation example syntax

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msetnx Translation example syntax

psetex Translation example syntax

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strlen Translation example syntax

hdel Translation example syntax

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hgetall Translation example syntax

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hincrbyfloat Translation example syntax

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hmget Translation example syntax

hmset Translation example syntax

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brpop Translation example syntax

brpoplpush Translation example syntax

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lpush Translation example syntax

lpushx Translation example syntax

lrange Translation example syntax

lrem Translation example syntax

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rpop Translation example syntax

rpoplpush Translation example syntax

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zadd Translation example syntax

zcard Translation example syntax

zcount Translation example syntax

zincrby Translation example syntax

zrange Translation example syntax

zrangebyscore Translation example syntax

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redis DECR command

Chinese translationRecent Updates：2018-05-16 09:50:47

UK ['dɪkr] US ['dɪkr]

abbr.decrease reduce; become less; decrement(al)(ly) reduce; decrease

redis DECR command Video explanation

redis DECR command syntax

Function: Decrease the numerical value stored in key by one.

Syntax: DECR key

Description: If key does not exist, the value of key will be initialized to 0 first, and then DECR will be executed operate. If the value contains the wrong type, or a value of type string cannot be represented as a number, an error is returned. The value of this operation is limited to 64-bit signed number representation.

Available versions: >= 1.0.0

Time complexity: O(1)

Return: The value of key after executing the DECR command.

redis DECR command example

# 对存在的数字值 key 进行 DECR
redis> SET failure_times 10
OK
redis> DECR failure_times
(integer) 9
# 对不存在的 key 值进行 DECR
redis> EXISTS count
(integer) 0
redis> DECR count
(integer) -1
# 对存在但不是数值的 key 进行 DECR
redis> SET company YOUR_CODE_SUCKS.LLC
OK
redis> DECR company
(error) ERR value is not an integer or out of range

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