I have a table with four columns and 5 rows, I want all the 5 rows with sum of one column. Is it possible in MySQL?
name id rank points
sam 1 4 34
ram 2 6 45
hari 3 1 87
kum 4 7 56
raj 5 5 20
What I need is name id rank points and sum of points where rank above 4.
Expected result
name id rank points sum
ram 2 6 45 121
kum 4 7 56
raj 5 5 20
Hmmm . . .
select name, id, rank, points,
(select sum(t2.points) from t t2 where t2.rank > 4) as `sum`
from t
where rank > 4;
This puts the sum
on each row, but that seems like a reasonable approach.
For you and others, the DML & DDL I used is:
CREATE TABLE `users` (
`name` varchar(5),
`id` int,
`rank` int,
`points` int
);
INSERT INTO users (
`name`, `id`, `rank`, `points`
) VALUES (
'sam', 1, 4, 34
), (
'ram', 2, 6, 45
), (
'hari', 3, 1, 87
), (
'kum', 4, 7, 56
), (
'raj', 5, 5, 20
);
For doing it, you need to have a separate query:
SELECT SUM(`points`) FROM `users` WHERE `rank` > 4
And I would suggest you to append this at the end.
SELECT *, (
SELECT SUM(`points`) FROM `users` WHERE `rank` > 4
) AS `sum` FROM `users` WHERE `rank` > 4
The above will give this as output:
+------+----+------+--------+-----+
| name | id | rank | points | sum |
+------+----+------+--------+-----+
| ram | 2 | 6 | 45 | 121 |
| kum | 4 | 7 | 56 | 121 |
| raj | 5 | 5 | 20 | 121 |
+------+----+------+--------+-----+
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.