Sql Server 行列转换

今天碰到一个特殊的应用场景,收集到的客流数据,数据颗粒度到了单店单小时。

现在需要统计每个门店每天的客流数据,下面开搞。

 

1.原始数据:

 select * from yd_peopleflow 

结果:

 

2.先用简单的SQL实现7天的数据统计

 1 select shopname,[2017-12-28],[2017-12-29],[2017-12-30],
 2 [2018-01-01],[2018-01-02],[2018-01-03],[2018-01-04]
 3 from 
 4 (
 5     select shopNo,shopName,convert(varchar(100),StartDate,23) Date,Convert(decimal(28,0),isnull(InQty,0)) InQty
 6     from yd_peopleflow  where StartDate >=DATEADD(DAY,-7,GETDATE())) t1
 7 pivot (
 8 sum(InQty) for Date 
 9 in([2017-12-28],[2017-12-29],[2017-12-30],[2018-01-01],[2018-01-02],[2018-01-03],[2018-01-04])
10 ) t2

查询结果:

 

 3.封装成存储过程 

 1 if exists(select 1 from sysobjects where name ='GetPeopleFlow' and xtype ='P' ) drop proc GetPeopleFlow
 2 go
 3 create proc GetPeopleFlow(@DateSetp varchar(20) ,@DateNumber int)
 4 as
 5 begin
 6     declare @startDate datetime,@enddate datetime,@dateSql varchar(500),@temp datetime,@Sql NVARCHAR (MAX)
 7 
 8     if(@DateSetp ='month')
 9     begin
10         select @startDate =DATEADD(MONTH,-@DateNumber,cast(convert(varchar(10),getdate(),120) as datetime))
11     end
12     if(@DateSetp='day')
13     begin
14         select @startDate =DATEADD(DAY,-@DateNumber,cast(convert(varchar(10),getdate(),120) as datetime))
15     end
16     
17     select @enddate =cast(convert(varchar(10),getdate(),120) as datetime)
18 
19     set @dateSql =''
20     set @temp = @startdate
21     while(@temp <=@enddate)
22     begin
23         set @dateSql = @dateSql +'['+ convert(varchar(100),@temp,23)+'],'
24         set @temp = dateadd(day,1,@temp)
25     end
26     set @dateSql = left(@dateSql,len(@dateSql)-1)
27 
28 
29     SET @sql ='select shopName ''门店'', '+@dateSql+'from (
30     select shopNo,shopName,convert(varchar(100),StartDate,23) Date,Convert(decimal(28,0),isnull(InQty,0)) InQty
31     from yd_peopleflow  where StartDate >=DATEADD(DAY,-7,GETDATE())) t1
32     pivot (sum(InQty) for Date in('+@dateSql+')) t2 '
33 
34     EXEC(@sql);
35 
36 end
37 go

执行存储过程:

 

1 GetPeopleFlow 'day',3

结果:

 

到此,业务结束,目标达成,前端只要执行存储过程就行。

当然如果C#或者Java可以后台直接拼装成代码,就不需要数据库端拼接数据库语句了。

 

posted @ 2018-01-04 20:45  金钱  阅读(868)  评论(0编辑  收藏  举报