SqlServer mssql 按月统计所有部门

 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

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