在存儲過程中創建臨時表來重構數據

有下面兩張表

這種情況下查詢出來的結果按下面的形式顯示:

ID	Name	Tm	Score
001	小小	2011-1-1	90
001	小小	2011-2-1	80
002	小強	2011-1-5	75

這種結果是通過Tab_Score inner jion Tab_Students 來實現的，導致每個時間有一個考核分數，然后進行羅列顯示。

然而有時客戶希望得到下面的顯示結果。

ID	Name	年份	月份	上旬分數	中旬分數	下旬分數	全月分數

也就是每個月份有一個顯示記錄

作為一個和用戶交互的、可分頁存儲過程一般包括下面幾個輸入參數：

     開始時間、結束時間、開始取值位置，結束取值位置、搜索條件、排序條件

下面是通過臨時表來重構數據的一個查詢：

--參數
declare    @startdate datetime='2011-01-15 08:00:00.000'
declare    @enddate datetime='2012-10-22 08:00:00.000'

declare  @startIndex int=1
declare    @endIndex int=100

declare @conditionStr nvarchar(200)='1<>0'
declare @orderStr nvarchar(200)='ID desc'
--臨時表
drop table #MyTable
create table #MyTable
(
    ID nvarchar(50) not null,
    Name nvarchar(50) not null,
    Yr int not null,
    Mth int not null,
    UpScore int not null,
    MiddleScore int not null,
    DownScore int not null,
    AllScore int not null,
)
--獲取月初時間
set @startdate=DATEADD(MM,DATEDIFF(MM,0,@startdate),0)
set @enddate=DATEADD(MM,DATEDIFF(MM,0,@enddate), 0)
--向臨時表添加數據
while @startdate<@enddate
begin
      insert into #MyTable (ID,Name,Yr,Mth,UpScore,MiddleScore,DownScore,AllScore)
      select Tab_Students.ID,
             Tab_Students.Name,
             DATEPART(YEAR,@startdate)  as Yr,
             DATEPART(MONTH,@startdate)  as Mth,
             (
               select isnull(sum(Score),0) from Tab_Score
               where Tab_Score.ID =  Tab_Students.ID
                     and TM between @startdate and DATEADD(DAY,10,@startdate)
             )as UpScore,
             (
               select isnull(sum(Score),0) from Tab_Score
               where Tab_Score.ID =  Tab_Students.ID
                     and TM between DATEADD(DAY,10,@startdate) and DATEADD(DAY,20,@startdate)
             )as MiddleScore,
             (
               select isnull(sum(Score),0) from Tab_Score
               where Tab_Score.ID =  Tab_Students.ID
                     and TM between DATEADD(DAY,20,@startdate) and DATEADD(mm,1,@startdate)
             )as DownScore,
             (
               select isnull(sum(Score),0) from Tab_Score
               where Tab_Score.ID =  Tab_Students.ID
                     and TM between @startdate and DATEADD(mm,1,@startdate)
             )as AllScore
      from Tab_Students
   set @startdate=DATEADD(mm,1,@startdate)
end    
--結果查詢
declare @selectStr nvarchar(1000)
set @selectStr='select * from #MyTable where ' + @conditionStr +' order by '+@orderStr 
exec (@selectStr)

 

 

--結果表
IF  EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[#MyTable]') AND type in (N'U'))
DROP TABLE [dbo].[#MyTable]
create table #MyTable
(
    DRP decimal(8,2),
    TM datetime
)


declare @DRP decimal(8,2)

--查詢時段：8:00 .....8:00    雨量統計算結束時間的8:00-8:00
while @startTime<@endTime 
  begin
    select @DRP= isnull(sum(DRP),0)  FROM  ST_PPTN_R
    where 
    STCD = @STCD and 
    TM >DATEADD(hh,-1,@startTime) and TM<=@startTime and --向前推一個小時到當前時間
    STCD+','+cast(TM as Nvarchar) not in (select ST_PPTN_R_Add.STCD+','+cast(ST_PPTN_R_Add.TM as Nvarchar) from ST_PPTN_R_Add)
    
    insert into #MyTable(DRP,TM)
    values
    (
       @DRP, 
       @startTime--降雨結束時間
    )
    set @startTime=DATEADD(hh,1,@startTime)  
  end
select * from  #MyTable