HKEYS – Redis

Available since 2.0.0.

时间复杂度： O(N) where N is the size of the hash.

Returns all field names in the hash stored at key.

返回值

Array reply: list of fields in the hash, or an empty list when key does not exist.

redis> HSET myhash field1 "Hello"

(integer) 1

redis> HSET myhash field2 "World"

(integer) 1

redis> HKEYS myhash

1) "field1"
2) "field2"