Question

Like the title says I need to have a final result where on one line I have
year- month and week…

Something like that:

------------------------
| Year | Month | Week  |  
| 2012 |   1   |   1   |  
| 2012 |   1   |   2   |  
| 2012 |   1   |   3   |  
| 2012 |   1   |   4   |  
| 2012 |   1   |   5   |  
| 2012 |   2   |   5   |  

And so on…

Is it possible to generate a view like this (also using some support table)?

Answer 1

You can do it with a stored procedure:

DELIMITER $$

CREATE PROCEDURE createDatesTable()
BEGIN

DECLARE FullDate date;

DROP TABLE IF EXISTS dates;
CREATE TABLE dates(
date_key date NOT NULL,
calendarYear int NOT NULL,
calendarQuarter tinyint NOT NULL,
calendarMonthNo int NOT NULL,
calendarWeekNo tinyint NOT NULL,
dayNumberOfMonth tinyint NOT NULL,
dayNumberOfWeek tinyint NOT NULL,
PRIMARY KEY (date_key));

SET FullDate  = '2012-01-01';

WHILE (FullDate <= '2012-12-31') DO 
BEGIN

INSERT INTO dates( 
    date_key,
    calendarYear,
    calendarQuarter,
    calendarMonthNo,
    calendarWeekNo,
    dayNumberOfMonth,
    dayNumberOfWeek
)VALUES( 
    FullDate,
    YEAR(FullDate),
    QUARTER(FullDate),
    MONTH(FullDate),
    WEEK(FullDate, 1), /*Have a look at the WEEK() function in the manual!!!*/
    DAYOFMONTH(FullDate),
    DAYOFWEEK(FullDate)
);

SET FullDate = DATE_ADD(Fulldate, INTERVAL 1 DAY);
END;
END WHILE;
END ;
$$
DELIMITER ;

Then do a call createDatesTable()

and you will have your table filled.

Important: ypercube’s comment is right. You have to consider this. So have a look at the WEEK() function and its supported modes. Adjust the procedure accordingly.