以订单统计为例,前端展示柱状图(Jquery统计):
表及主要字段描述如下;表名:Orders
1.日期CreateTime
2.金额Amount
3.用户UserID
情况一:
根据部门统计某一年每月销量(查询一个部门月统计)
1)直接在SQL语句中判断每月信息,好处,前台直接调用;坏处,性能不高。
SQL语句:
SELECT SUM(CASE WHEN MONTH(s.CreateTime) = 1 THEN s.Amount ELSE 0 END) AS '一月', SUM(CASE WHEN MONTH(s.CreateTime) = 2 THEN s.Amount ELSE 0 END) AS '二月', SUM(CASE WHEN MONTH(s.CreateTime) = 3 THEN s.Amount ELSE 0 END) AS '三月', SUM(CASE WHEN MONTH(s.CreateTime) = 4 THEN s.Amount ELSE 0 END) AS '四月', SUM(CASE WHEN MONTH(s.CreateTime) = 5 THEN s.Amount ELSE 0 END) AS '五月', SUM(CASE WHEN MONTH(s.CreateTime) = 6 THEN s.Amount ELSE 0 END) AS '六月', SUM(CASE WHEN MONTH(s.CreateTime) = 7 THEN s.Amount ELSE 0 END) AS '七月', SUM(CASE WHEN MONTH(s.CreateTime) = 8 THEN s.Amount ELSE 0 END) AS '八月', SUM(CASE WHEN MONTH(s.CreateTime) = 9 THEN s.Amount ELSE 0 END) AS '九月', SUM(CASE WHEN MONTH(s.CreateTime) = 10 THEN s.Amount ELSE 0 END) AS '十月', SUM(CASE WHEN MONTH(s.CreateTime) = 11 THEN s.Amount ELSE 0 END) AS '十一月', SUM(CASE WHEN MONTH(s.CreateTime) = 12 THEN s.Amount ELSE 0 END) AS '十二月' FROM Orders AS s WHERE YEAR(s.CreateTime) = 2014
--其他条件
结果:
一月 二月 三月 四月 五月 六月 七月 八月 九月 十月 十一月 十二月 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 741327.00 120505.00 0.00
2)统计出数据库里有值的月份,再前端逻辑判断其他月份补0
SQL语句:
SELECT UserID, MONTH ( CreateTime ) as 月份, SUM( Amount ) as 统计 FROM Orders WHERE YEAR ( CreateTime ) = 2014 -- 这里假设你要查 2014年的每月的统计。 --其他条件 GROUP BY UserID, MONTH ( CreateTime )
结果:
月份 销售额 10 741327.00 11 120505.00
情况二:
统计所有部门某一年每月销量
1)此数据量大的话影响性能,SQL语句(这里未联查部门表):
SELECT UserID, SUM(CASE WHEN MONTH(s.CreateTime) = 1 THEN s.Amount ELSE 0 END) AS '一月', SUM(CASE WHEN MONTH(s.CreateTime) = 2 THEN s.Amount ELSE 0 END) AS '二月', SUM(CASE WHEN MONTH(s.CreateTime) = 3 THEN s.Amount ELSE 0 END) AS '三月', SUM(CASE WHEN MONTH(s.CreateTime) = 4 THEN s.Amount ELSE 0 END) AS '四月', SUM(CASE WHEN MONTH(s.CreateTime) = 5 THEN s.Amount ELSE 0 END) AS '五月', SUM(CASE WHEN MONTH(s.CreateTime) = 6 THEN s.Amount ELSE 0 END) AS '六月', SUM(CASE WHEN MONTH(s.CreateTime) = 7 THEN s.Amount ELSE 0 END) AS '七月', SUM(CASE WHEN MONTH(s.CreateTime) = 8 THEN s.Amount ELSE 0 END) AS '八月', SUM(CASE WHEN MONTH(s.CreateTime) = 9 THEN s.Amount ELSE 0 END) AS '九月', SUM(CASE WHEN MONTH(s.CreateTime) = 10 THEN s.Amount ELSE 0 END) AS '十月', SUM(CASE WHEN MONTH(s.CreateTime) = 11 THEN s.Amount ELSE 0 END) AS '十一月', SUM(CASE WHEN MONTH(s.CreateTime) = 12 THEN s.Amount ELSE 0 END) AS '十二月' FROM Orders AS s WHERE YEAR(s.CreateTime) = 2014 group by UserID
结果:
UserID 一月 二月 三月 四月 五月 六月 七月 八月 九月 十月 十一月 十二月 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 53495.00 0.00 2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 738862.00 37968.00 0.00 3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2099.00 22849.00 0.00 4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 366.00 0.00 0.00 5 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6193.00 0.00
2)百度看到有人提到列转行,未看到实例,不太清楚具体实现方式。有知道的朋友,请告知,谢谢!
SELECT UserID, MONTH ( CreateTime ) as 月份, SUM( Amount ) as 统计 FROM Orders WHERE YEAR ( CreateTime ) = 2014 -- 这里假设你要查 2014年的每月的统计。 GROUP BY UserID,MONTH ( CreateTime ) 结果: UserID 月份 统计 1 10 738862.00 2 10 2099.00 3 10 366.00 4 11 53495.00 1 11 37968.00 2 11 22849.00
5 11 6193.00