Group by Query - Select row with maximum date - mysql

Question

Hi I have this scores table, And in my report on front end, I have to display the keyword and url and score for latest scan.
CREATE TABLE `scores` (
`id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`keyword` varchar(200) DEFAULT NULL,
`url` varchar(200) DEFAULT NULL,
`score` int(11) DEFAULT NULL,
`check_date` date DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=latin1;
Here is my Example Data:
Sample Data
| id | keyword | url | score | check_date |
|----|----------|----------------------|-------|------------|
| 1 | facebook | https://facebook.com | 10 | 2020-10-21 |
| 2 | facebook | https://facebook.com | 30 | 2020-10-25 |
| 3 | fb | https://facebook.com | 55 | 2020-10-23 |
| 4 | fb | https://facebook.com | 20 | 2020-10-24 |
My Query
SELECT s1.*
FROM scores s1
JOIN scores s2
ON s1.id = s2.id
WHERE s1.check_date = s2.check_date
GROUP BY keyword,url
It returns correct check_date for a specific keyword, url but score is not according to that date. Please help.

Answer 1

Do not use aggregation for this. A simple method is a correlated subquery:
select s.*
from scores s
where s.check_date = (select max(s2.check_date)
from scores s2
where s2.keyword = s.keyword and s2.url = s.url
);
If you are intent on using an explicit join you can use a left join, look for a larger date, and return the rows that have no larger date:
select s.*
from scores s left join
scores slater
on slater.keyword = s.keyword and
slater.url = s.url and
slater.check_date > s.check_date
where slater.check_date is null;