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";   

这是我的查询，显示一些数据，如性别，年龄等每天。 我怎样才能将这些日期按月或年汇总并显示添加的数据？

如果我不解释自己，请注意我：）

Answer 1

GROUP BY year(date), month(date)。