Working with MySQL / MySQLi data - daily, weekly and monthly graphs - mysql

Question

I'm developing a dashboard with graphs.
What's the problem?
Let's say, that I have a table with the folowing sctructure:
+-------+------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+------+------+-----+---------+-------+
| total | int | NO | | NULL | |
| new | int | NO | | NULL | |
| date | date | YES | | NULL | |
+-------+------+------+-----+---------+-------+
where total stands for Total Members and new for New Members (date is a date of course - in format: yyyy-mm-dd).
Example of columns:
+-------+-------+------------+
| total | new | date |
+-------+-------+------------+
| 3450 | 21 | 2021-11-06 |
| 3650 | 200 | 2021-11-07 |
| 3694 | 34 | 2021-11-08 |
| 3520 | 26 | 2021-11-09 |
| 3399 | -321 | 2021-11-10 |
| 3430 | 31 | 2021-11-11 |
| 3450 | 20 | 2021-11-12 |
| 3410 | -40 | 2021-11-13 |
| 3923 | 513 | 2021-11-14 |
| 4019 | 96 | 2021-11-15 |
| 4119 | 100 | 2021-11-16 |
| 4000 | -119 | 2021-11-17 |
| 3000 | -1000 | 2021-11-18 |
| 3452 | 452 | 2021-11-19 |
| 3800 | 348 | 2021-11-20 |
| 3902 | 102 | 2021-11-21 |
| 4050 | 148 | 2021-11-22 |
+-------+-------+------------+
And there are a few options, where the dashboard user can select between 2 dates and type of graphs (daily, weekly, monthly).
Image, that describes the Setting options.
The Point
I need to take these 2 dates and somehow get all data from the database between the given term. Well, but that's not all. The Daily, Weekly and Monthly option means, that graphs will be showing average newcoming and total members per every week (so if I will grab 7 days from the database, I need to create an average - and do this between all these days / weeks / months in a term), if it's weekly, etc. So the final graph will be showing something like:
250 new 20 new 31 new
1000 total 1020 total 1051 total
Nov 7 Nov 14 Nov 21
etc...
More informations:
Ubuntu: 21.04
MySQL: 8.0.27
PHP: 7.4.23
Apache: 2.4.46
Does anyone have any ideas?

Answer 1

I don't get where your numbers come from
But your query would go like this.
For the month you need to group by MONTHof course
CREATE TABLE members (
`total` INTEGER,
`new` INTEGER,
`date` date
);
INSERT INTO members
(`total`, `new`, `date`)
VALUES
('3450', '21', '2021-11-06'),
('3650', '200', '2021-11-07'),
('3694', '34', '2021-11-08'),
('3520', '26', '2021-11-09'),
('3399', '-321', '2021-11-10'),
('3430', '31', '2021-11-11'),
('3450', '20', '2021-11-12'),
('3410', '-40', '2021-11-13'),
('3923', '513', '2021-11-14'),
('4019', '96', '2021-11-15'),
('4119', '100', '2021-11-16'),
('4000', '-119', '2021-11-17'),
('3000', '-1000', '2021-11-18'),
('3452', '452', '2021-11-19'),
('3800', '348', '2021-11-20'),
('3902', '102', '2021-11-21'),
('4050', '148', '2021-11-22');
SELECT `new`,sumtotal, `date` FROM members m
INNER JOIN (SELECT SUM(`new`) sumtotal, MIN(`date`) mindate FROM members GROUP BY WEEK(`date`)) t1
ON m.`date`= t1.mindate
WHERE m.`date` BETWEEN '2021-11-07' AND '2021-11-22'
new | sumtotal | date
--: | -------: | :---------
200 | -50 | 2021-11-07
513 | 390 | 2021-11-14
102 | 250 | 2021-11-21
db<>fiddle here