Redis HKEYS Command

The Redis HKEYS command returns all fields in the hash stored at the specified key.

Syntax

The syntax goes like this:

HKEYS key

So all we do is pass the name of the key to the command.

Suppose we set the following hash:

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

Result:

(integer) 3

We can use HKEYS to get all fields from that hash:

HKEYS customer

Result:

1) "firstname"
2) "lastname"
3) "age"

The result is an array reply containing the field names.

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

HKEYS nonexistentkey

Result:

(empty array)

Passing the wrong number of arguments results in an error:

HKEYS customer lastname

Result:

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