0

We have a report that needs to get data for 7 days into a result table like this:

declare @table table (ProductId int, product nvarchar(255), supplier nvarchar(255), day1 int,  day2 int, day3 int, day4 int, day5 int, day6 int, day7 int)

However the problem is that I currently run 7 insert statements that are nearly identical.

insert @table (ProductId, product, supplier, day1)
select 
   productId,
   product, 
   supplier,
   COUNT(productId)
from 
   @results
where 
   createdDate = @Date   
group by
   CreatedDate, ProductId, Product, supplier

This one inserts into day1, however I have to do the same with day2, day3.... just changing the @Date

What I would like to do is create a loop that will insert into the correct column depending which is the current loop (ie. is is processing day1, or day2...).

Is there a way to dynamically set it to the correct column name for the insert statement?

I'm using: sql server 2008R2

4

3 に答える 3

2

SQL-Server 2008 で PIVOT 関数を使用して、1 つのクエリで挿入をすべて実行してみませんか?

私はあなたの日が連続していると仮定しています.あなたの列はDay1、Day2などです.

;WITH Data AS
(   SELECT  ProductID,
            Product,
            Supplier,
            DATEDIFF(DAY, @Date, CreatedDate) + 1 AS DayNumber,
            ProductID AS [Counter]
    FROM    @Results
    WHERE   CreatedDate BETWEEN @Date AND DATEADD(DAY, 7, @Date)
)
INSERT @table (ProductID, Product, Supplier, Day1, Day2, Day3, Day4, Day5, Day6, Day7)
SELECT  *
FROM    Data
        PIVOT
        (   COUNT([Counter])
            FOR DayNumber IN ([1], [2], [3], [4], [5], [6], [7])
        ) pvt
于 2012-07-02T11:58:20.867 に答える
1

SQL の問題を処理するときにループの使用について疑問に思ったことがある場合は、適切な考え方で問題に取り組んでいない可能性があります。

下がスタート地点。

SELECT  productId
      , product
      , supplier
      , day1 = SUM(CASE WHEN createdDate = @date THEN 1 ELSE 0 END)
      , day2 = SUM(CASE WHEN createdDate = DATEADD(d,1,@date) THEN 1 ELSE 0 END)...   


FROM    @results
WHERE   createdDate >= @Date
GROUP BY CreatedDate
      , ProductId
      , Product
      , supplier
于 2012-07-02T12:00:31.710 に答える
0

このようにする代わりに、ターゲット テーブル構造を変更して、day_count という 2 つの列を追加することをお勧めします。この列には、1 日のカウントと createdDate が格納されます。

create table @table (productId int,product int, supplier int,
    createdDate date,day_count int)

このテーブルは、以下のクエリを使用して設定できます

insert @table (ProductId, product, supplier,createdDate, day_count)
select 
   productId,
   product, 
   supplier,
   createdDate,
   COUNT(productId)
from 
   @results
where 
   createdDate between @Date and dateadd(dd, 7, @Date)
group by
   CreatedDate, ProductId, Product, supplier

そして、以下のクエリを使用して目的の出力を取得します

 declare @startDate date ='2012-07-02';
 with cte as(
select productId ,product , supplier ,createdDate, datediff(dd,
    @startDate,createdDate)+1 [day_num],
    day_count from #tmp)
 select productId ,product , supplier ,createdDate , 
 case when day_num=1 then day_count end [day1],
 case when day_num=2 then day_count end [day2],
 case when day_num=3 then day_count end [day3],
 case when day_num=4 then day_count end [day4],
 case when day_num=5 then day_count end [day5],
 case when day_num=6 then day_count end [day6],
 case when day_num=7 then day_count end [day7]
  from cte
于 2012-07-02T12:17:06.053 に答える