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redis EXISTS command

Chinese translationRecent Updates：2018-05-16 09:07:27

英[ɪgˈzɪst] 　　美[ɪɡˈzɪst] 　　

##vi.Existence; survive; live; continue to exist

Third person singular: exists Present participle: existing Past tense: existed Past participle: existed

redis EXISTS command Video explanation

redis EXISTS command syntax

Function: Check whether the given key exists.

Syntax: EXISTS key

Available versions: >= 1.0.0

Time complexity: O(1)

Return: If key exists, return 1, otherwise return 0.

redis EXISTS command example

redis> SET db "redis"
OK
redis> EXISTS db
(integer) 1
redis> DEL db
(integer) 1
redis> EXISTS db
(integer) 0

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