mySQL SELECT upcoming birthdays

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我寻月下人不归
我寻月下人不归 2020-12-03 11:17

I\'m trying to write a query to select users of a database whose birthdays are in the next 7 days.

I\'ve done a lot of research but I can\'t come up with a working s

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  •  渐次进展
    2020-12-03 11:51

    To get all birthdays in next 7 days, add the year difference between the date of birth and today to the date of birth and then find if it falls within next seven days.

    SELECT * 
    FROM  persons 
    WHERE  DATE_ADD(birthday, 
                    INTERVAL YEAR(CURDATE())-YEAR(birthday)
                             + IF(DAYOFYEAR(CURDATE()) > DAYOFYEAR(birthday),1,0)
                    YEAR)  
                BETWEEN CURDATE() AND DATE_ADD(CURDATE(), INTERVAL 7 DAY);
    

    If you want to exclude today's birthdays just change > to >=

    SELECT * 
    FROM  persons 
    WHERE  DATE_ADD(birthday, 
                    INTERVAL YEAR(CURDATE())-YEAR(birthday)
                             + IF(DAYOFYEAR(CURDATE()) >= DAYOFYEAR(birthday),1,0)
                    YEAR)  
                BETWEEN CURDATE() AND DATE_ADD(CURDATE(), INTERVAL 7 DAY);
    
    -- Same as above query with another way to exclude today's birthdays 
    SELECT * 
    FROM  persons 
    WHERE  DATE_ADD(birthday, 
                    INTERVAL YEAR(CURDATE())-YEAR(birthday)
                             + IF(DAYOFYEAR(CURDATE()) > DAYOFYEAR(birthday),1,0)
                    YEAR) 
                BETWEEN CURDATE() AND DATE_ADD(CURDATE(), INTERVAL 7 DAY)
         AND DATE_ADD(birthday, INTERVAL YEAR(CURDATE())-YEAR(birthday) YEAR) <> CURDATE();
    
    
    -- Same as above query with another way to exclude today's birthdays 
    SELECT * 
    FROM  persons 
    WHERE  DATE_ADD(birthday, 
                    INTERVAL YEAR(CURDATE())-YEAR(birthday)
                             + IF(DAYOFYEAR(CURDATE()) > DAYOFYEAR(birthday),1,0)
                    YEAR) 
                BETWEEN CURDATE() AND DATE_ADD(CURDATE(), INTERVAL 7 DAY)
         AND (MONTH(birthday) <> MONTH(CURDATE()) OR DAY(birthday) <> DAY(CURDATE()));
    

    Here is a DEMO of all queries

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