How to group by time slot between two dates - mysql

Question

I have a question that make me feel silly !
I have to do some stats on the use of my apps.
I have a table call : customer_point
id int(11) auto_increment
id_customer int(11)
type_point int(11)
date timestamp CURRENT_TIMESTAMP
I want to make this request for the entire month (with a row for each night ;) ) :
SELECT COUNT( id_customer ) , type_point, date(date)
FROM customer_point
WHERE date BETWEEN "2014-06-01 20:00:00" AND "2014-06-02 10:00:00"
GROUP BY type_point, date;
I nearly sure that i miss a crusial point but i can't find witch one.
Thank you very much for reading me !
Bye,
edit :
Sample :
INSERT INTO `customer_point` ( `id` , `id_customer` , `type_point`, `date` )
VALUES ( '', '15', '1', '2014-06-01 22:50:00'), ( '', '15', '1', '2014-06-01 23:52:00'), ( '', '15', '1', '2014-06-02 9:50:00'), ( '', '15', '1', '2014-06-30 22:50:00'), ( '', '15', '1', '2014-06-30 23:52:00'), ( '', '15', '1', '2014-07-01 02:50:00', ( '', '15', '1', '2014-07-01 09:50:00');
result :
1, 3, 2014-06-01
1, 4, 2014-06-30
I hope this will help everbody to understand my probleme :/

Answer 1

If you just want coutns of the actual data, check the date is within the range you are interested in and that the time is at night (ie, greater than 8pm or less than 10am, if would seem from your SQL):-
SELECT type_point, date(customer_point.date) AS aDate, COUNT( id_customer )
FROM customer_point
WHERE DATE(customer_point.date) BETWEEN "2014-06-01" AND "2014-06-30"
AND TIME(customer_point.date) >= '20:00:00' OR TIME(customer_point.date) <= '10:00:00'
GROUP BY type_point, aDate;
To get a row per day, irrespective of whether there is any data that day(ie, a count of zero it no data) then you need to generate a list of dates and then LEFT JOIN your data to it.
Something like this:-
SELECT sub0.aDate, type_point, COUNT( id_customer )
FROM
(
SELECT DATE_ADD('2014-06-01', INTERVAL units.i + tens.i * 10 DAY) AS aDate
FROM
(SELECT 0 i UNION SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9) units
CROSS JOIN
(SELECT 0 i UNION SELECT 1 UNION SELECT 2 UNION SELECT 3) tens
) sub0
LEFT OUTER JOIN customer_point
ON sub0.aDate = date(customer_point.date)
WHERE sub0.aDate BETWEEN "2014-06-01" AND "2014-06-30"
GROUP BY sub0.aDate, type_point;
You would also probably need to generate a list of type_point values.
EDIT - to go with the updated question, can you just subtract 10 hours from the date / time. So 10am on the 1st July becomes midnight on the 30th June?
SELECT type_point, date(DATE_ADD(customer_point.date, INTERVAL -10 HOUR)) AS aDate, COUNT( id_customer )
FROM customer_point
WHERE DATE(DATE_ADD(customer_point.date, INTERVAL -10 HOUR)) BETWEEN "2014-06-01" AND "2014-06-30"
AND TIME(customer_point.date) >= '20:00:00' OR TIME(customer_point.date) <= '10:00:00'
GROUP BY type_point, aDate;
SQL fiddle:-
http://www.sqlfiddle.com/#!2/ddc95/2
The issue with this is whether items from before 10am on the 1st of June count as dates for May or for June?

Answer 2

Using mysql you even could do
WHERE date LIKE "2014-06-%"
Edit: You need exactly from 20:00 and then you have to take in account the first day of the next mounth until the 22:00...
Ok, then just substract those 20 hours to the date:
SELECT DATE_SUB(column, INTERVAL 20 HOUR)....
Finally:
SELECT COUNT( id_customer ) , type_point, DATE_SUB(date, INTERVAL 20 HOUR) as mydate
FROM customer_point
WHERE mydate LIKE "2014-06-%"
GROUP BY type_point, date;