HMGET command in redis

HMGET key field [field ...]

HMGET command returns the values associated with the specified fields in the hash stored at key.

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

TIME COMPLEXITY O(N) where N is the number of fields being requested.

RETURN VALUE Multi-bulk reply: list of values associated with the given fields, in the same order as they are requested.

Syntax:

HMGET KEY_NAME FIELD_NAME1 FIELD_NAME2 ... FIELD_NAMEN

Example 1: When all fields are present.

redis:6379> HMGET myhash field field2
1) "200"
2) "200"

Output

1) "200"

2) "200"

Example 2: When one or more fields are not present.

redis:6379> HMGET myhash field field2 field3
1) "200"
2) "200"
3) (nil)

Output

1) "200"

2) "200"

3) (nil)