How to delete values of redis hashmap key?

@lily 

To delete values of a Redis hashmap key, you can use the HDEL command. Here's how you can do it:

1. Connect to your Redis server using the command line interface or a Redis client.
2. Use the following command to delete a single field and its value from the hashmap:

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HDEL <key> <field>

Replace <key> with the name of the hashmap key and <field> with the name of the field you want to delete.

1. If you want to delete multiple fields and their values from the hashmap, you can specify them as additional arguments:

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HDEL <key> <field1> <field2> <field3> ...

1. Once you have executed the HDEL command, the specified fields and their corresponding values will be deleted from the hashmap associated with the key.

Keep in mind that if you try to delete a field that does not exist in the hashmap key, it will simply be ignored and no error will be returned.