MySQL 查询---日期

（1）每年 -每月

 

SELECT  YEAR(temp.time)  '年份', MONTH(temp.time) '月份',SUM(temp.num) '月销量'

          FROM temp GROUP BY YEAR(temp.time),MONTH(temp.time);

 

（2）按年 总量

SELECT YEAR(temp.time) '年份', SUM(temp.num) '总量'

          FROM temp GROUP BY YEAR(temp.time);

（3）当前日期

 

SELECT t.id '年份', SUM(t.moon1) '年销量'

  FROM(

      SELECT YEAR(temp.time) id,

                   CASE WHEN YEAR(temp.time)=YEAR(NOW())-1

                   THEN SUM(temp.num)

                     END as MOON1

             FROM temp WHERE 1=1 GROUP BY temp.id,temp.time

) t GROUP BY id;