How do I calculate the revenue earned per person and per year - sql

Question

I suppose it is quite simple, I just can't get the hang of it.
At the moment I have the following code:
SELECT s.first_name, s.last_name, s.staff_id, SUM(p.amount) AS 'Revenue'
FROM payment p
JOIN staff s
ON s.staff_id = p.staff_id
GROUP BY s.staff_id
This gives me the 2 staff members and their revenue but I'm still missing the yearly part.
I'm yet again using the sakila database, if anybody could help me I would really appreciate it, thanks in regards
Edit for the tables:
-- sakila.staff definition
CREATE TABLE `staff` (
`staff_id` tinyint(3) unsigned NOT NULL AUTO_INCREMENT,
`first_name` varchar(45) NOT NULL,
`last_name` varchar(45) NOT NULL,
`address_id` smallint(5) unsigned NOT NULL,
`picture` blob DEFAULT NULL,
`email` varchar(50) DEFAULT NULL,
`store_id` tinyint(3) unsigned NOT NULL,
`active` tinyint(1) NOT NULL DEFAULT 1,
`username` varchar(16) NOT NULL,
`password` varchar(40) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL,
`last_update` timestamp NOT NULL DEFAULT current_timestamp() ON UPDATE current_timestamp(),
PRIMARY KEY (`staff_id`),
KEY `idx_fk_store_id` (`store_id`),
KEY `idx_fk_address_id` (`address_id`),
CONSTRAINT `fk_staff_address` FOREIGN KEY (`address_id`) REFERENCES `address` (`address_id`) ON UPDATE CASCADE,
CONSTRAINT `fk_staff_store` FOREIGN KEY (`store_id`) REFERENCES `store` (`store_id`) ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8mb4;
CREATE TABLE `payment` (
`payment_id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
`customer_id` smallint(5) unsigned NOT NULL,
`staff_id` tinyint(3) unsigned NOT NULL,
`rental_id` int(11) DEFAULT NULL,
`amount` decimal(5,2) NOT NULL,
`payment_date` datetime NOT NULL,
`last_update` timestamp NOT NULL DEFAULT current_timestamp() ON UPDATE current_timestamp(),
PRIMARY KEY (`payment_id`),
KEY `idx_fk_staff_id` (`staff_id`),
KEY `idx_fk_customer_id` (`customer_id`),
KEY `fk_payment_rental` (`rental_id`),
CONSTRAINT `fk_payment_customer` FOREIGN KEY (`customer_id`) REFERENCES `customer` (`customer_id`) ON UPDATE CASCADE,
CONSTRAINT `fk_payment_rental` FOREIGN KEY (`rental_id`) REFERENCES `rental` (`rental_id`) ON DELETE SET NULL ON UPDATE CASCADE,
CONSTRAINT `fk_payment_staff` FOREIGN KEY (`staff_id`) REFERENCES `staff` (`staff_id`) ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=16050 DEFAULT CHARSET=utf8mb4;

Answer 1

This can be done by simply adding the year to the GROUP BY clause, like this:
SELECT s.first_name, s.last_name, s.staff_id, SUM(p.amount) AS 'Revenue'
, YEAR(payment_date) AS year
FROM payment p
JOIN staff s
ON s.staff_id = p.staff_id
GROUP BY s.staff_id, year
;
This means, generate a SUM for each group associated with rows having the same (staff_id, year) pairs.
The result:
+------------+-----------+----------+----------+------+
| first_name | last_name | staff_id | Revenue | year |
+------------+-----------+----------+----------+------+
| Mike | Hillyer | 1 | 33255.38 | 2005 |
| Mike | Hillyer | 1 | 234.09 | 2006 |
| Jon | Stephens | 2 | 33646.95 | 2005 |
| Jon | Stephens | 2 | 280.09 | 2006 |
+------------+-----------+----------+----------+------+