Running Total For Different Genders Problem
Description
LeetCode Problem 1308.
Table: Scores
1
2
3
4
5
6
7
8
9
10
11
12
+---------------+---------+
| Column Name | Type |
+---------------+---------+
| player_name | varchar |
| gender | varchar |
| day | date |
| score_points | int |
+---------------+---------+
(gender, day) is the primary key for this table.
A competition is held between females team and males team.
Each row of this table indicates that a player_name and with gender has scored score_point in someday.
Gender is 'F' if the player is in females team and 'M' if the player is in males team.
Write an SQL query to find the total score for each gender at each day.
Order the result table by gender and day
The query result format is in the following example:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
Scores table:
+-------------+--------+------------+--------------+
| player_name | gender | day | score_points |
+-------------+--------+------------+--------------+
| Aron | F | 2020-01-01 | 17 |
| Alice | F | 2020-01-07 | 23 |
| Bajrang | M | 2020-01-07 | 7 |
| Khali | M | 2019-12-25 | 11 |
| Slaman | M | 2019-12-30 | 13 |
| Joe | M | 2019-12-31 | 3 |
| Jose | M | 2019-12-18 | 2 |
| Priya | F | 2019-12-31 | 23 |
| Priyanka | F | 2019-12-30 | 17 |
+-------------+--------+------------+--------------+
Result table:
+--------+------------+-------+
| gender | day | total |
+--------+------------+-------+
| F | 2019-12-30 | 17 |
| F | 2019-12-31 | 40 |
| F | 2020-01-01 | 57 |
| F | 2020-01-07 | 80 |
| M | 2019-12-18 | 2 |
| M | 2019-12-25 | 13 |
| M | 2019-12-30 | 26 |
| M | 2019-12-31 | 29 |
| M | 2020-01-07 | 36 |
+--------+------------+-------+
For females team:
First day is 2019-12-30, Priyanka scored 17 points and the total score for the team is 17.
Second day is 2019-12-31, Priya scored 23 points and the total score for the team is 40.
Third day is 2020-01-01, Aron scored 17 points and the total score for the team is 57.
Fourth day is 2020-01-07, Alice scored 23 points and the total score for the team is 80.
For males team:
First day is 2019-12-18, Jose scored 2 points and the total score for the team is 2.
Second day is 2019-12-25, Khali scored 11 points and the total score for the team is 13.
Third day is 2019-12-30, Slaman scored 13 points and the total score for the team is 26.
Fourth day is 2019-12-31, Joe scored 3 points and the total score for the team is 29.
Fifth day is 2020-01-07, Bajrang scored 7 points and the total score for the team is 36.
MySQL Solution
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
select gender, day,
(select sum(score_points) total
from Scores b
where gender='F' and b.day<=a.day) total
from Scores a
where gender='F'
union
select gender, day,
(select sum(score_points) total
from Scores b
where gender='M' and b.day<=a.day) total
from Scores a
where gender='M'
order by gender, day
LeetCode Database - Medium
LeetCode 1132
LeetCode 1149
LeetCode 1158
LeetCode 1164
LeetCode 1174
LeetCode 1193
LeetCode 1204
LeetCode 1205
LeetCode 1212
LeetCode 1264
LeetCode 1270
LeetCode 1285
LeetCode 1308
LeetCode 1321
LeetCode 1341
LeetCode 1355
LeetCode 1364
LeetCode 1393
LeetCode 1398
More LeetCode Database
MySQL Tutorials