HMGET key field [field …]

Time complexity: O(N) where N is the number of fields being requested.

For every that does not exist in the hash, a nil value is returned. Because non-existing keys are treated as empty hashes, running against a non-existing will return a list of nil values.

redis> HSET myhash field1 "Hello"

redis> HMGET myhash field1 field2 nofield