Returns all field names in the hash stored at key.
@return
@array-reply: list of fields in the hash, or an empty list when key does
not exist.
@examples
HSET myhash field1 "Hello"
HSET myhash field2 "World"
HKEYS myhashReturns all field names in the hash stored at key.
@return
@array-reply: list of fields in the hash, or an empty list when key does
not exist.
@examples
HSET myhash field1 "Hello"
HSET myhash field2 "World"
HKEYS myhash