The Redis HMGET command allows us to get multiple values from a hash. It returns the value/s associated with the specified field/s in the hash at the specified key.

Syntax

The syntax goes like this:

HMGET key field [field ...]

Example

Suppose we set the following hash:

HSET customer firstname "Rob" lastname "Banks" age 37

Result:

(integer) 3

Now let’s use HMGET to get two values from that key:

HMGET customer firstname age

Result:

1) "Rob"
2) "37"

The result is an array reply containing the values associated with the given fields.

Change the Order

The values are returned in the same order as they are requested. Therefore, we can change the order like this:

HMGET customer age firstname

Result:

1) "37"
2) "Rob"

Non-Existent Fields

If the field doesn’t exist, nil is returned:

HMGET customer lastname height

Result:

1) "Banks"
2) (nil)

Non-Existent Keys

Running the command against a key that doesn’t exist results in nil being returned:

HMGET nonexistentkey firstname

Result:

1) (nil)

Passing the Wrong Number of Arguments

Passing the wrong number of arguments results in an error:

HMGET customer

Result:

(error) ERR wrong number of arguments for 'hmget' command