如何按月份或年份彙總日期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"; 

這是我的查詢，顯示一些數據，如性別，年齡等每天。 如何將這些日期按月份或年份彙總並顯示添加的數據？

通知我，如果我不是解釋我自己以及:)

Answer 1

GROUP BY year(date), month(date)。