Redis EXISTS

EXISTS Keys

The Redis EXISTS command is used to check whether key exists in redis or not.

Since Redis 3.0.3 it is possible to specify multiple keys instead of a single one. In such a case, it returns the total number of keys existing. Note that returning 1 or 0 for a single key is just a special case of the variadic usage, so the command is completely backward compatible.

If the same existing key is mentioned in the arguments multiple times, it will be counted multiple times.

Syntax:

EXISTS KEY_NAME

Available since

1.0.0.

Return Value

Integer value . Specifically
• 1, if the key exists.
• 0, if the key does not exist.

Return Value Type

Integer

Example: Redis EXISTS

First, create a key in redis and set some value in it and check for the existence of it.

127.0.0.1:6379> SET key "Good"
OK
127.0.0.1:6379> EXISTS key
(integer) 1
127.0.0.1:6379> EXISTS KEY
(integer) 0

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