redis hmget命令

HMGET key field [field …]

Returns the values associated with the specified fields in the hash stored at
key.

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

*返回值

Array reply: list of values associated with the given fields, in the same
order as they are requested.

redis>  HSET myhash field1 “Hello”

(integer) 1

redis>  HSET myhash field2 “World”

(integer) 1

redis>  HMGET myhash field1 field2 nofield

1) "Hello"
2) "World"
3) (nil)
redis>