如何按月或年汇总日期Mysql

Question

$SQLString = "SELECT    
            count(score) as counts,
            DATE(date),
            SUM(CASE WHEN gender = 1 then 1 ELSE 0 END) Male,
            SUM(CASE WHEN gender = 2 then 1 ELSE 0 END) Female,
            AVG(age) as age, score
            FROM persons  
            WHERE date > '".$_SESSION['date1']."' AND date < '".$_SESSION['date2']."' 
            GROUP BY DATE(date) 
            ORDER BY DATE(date) asc";   

This is my Query that display some data, like gender,age, etc per day. How could I aggregate those dates by months or years and display the added data?

Notice me if Im not explain my self as well :)

Answer 1

GROUP BY year(date), month(date) 。