keys

UK['ki:z] US['ki:z]

n.Key; key; (music) key (plural noun of key); solution

redis HKEYS command syntax

Function: Return all fields in the hash table key.

Syntax: HKEYS key

Available versions: >= 2.0.0

Time complexity: O(N), N is the size of the hash table.

Returns: A table containing all fields in the hash table. When key does not exist, an empty list is returned.

redis HKEYS command example

# 哈希表非空
redis> HMSET website google www.google.com yahoo www.yahoo.com
OK
redis> HKEYS website
1) "google"
2) "yahoo"
# 空哈希表/key不存在
redis> EXISTS fake_key
(integer) 0
redis> HKEYS fake_key
(empty list or set)