Question

在我的情况下，根据分配数量，每个区域都有产品交付。

Rowstamp  DocNos  ProductID  SiteCode   SiteDesc      Qty
1         AAAA    1AA        0200       Mckinley Area  2
2         AAAA    1BB        0200       Mckinley Area  3
3         AAAA    1CC        0200       Mckinley Area  1
4         BBBB    1AA        0300       Southwoods     4
5         BBBB    1BB        0300       Southwoods     2
6         BBBB    1CC        0300       Southwoods     2

但是现在每个元素都需要一行。这将用于单独标记项目框。这是我想要的输出：

Rowstamp  DocNos  ProductID  SiteCode   Description    Qty  
1         AAAA    1AA        0200       Mckinley Area  1
1         AAAA    1AA        0200       Mckinley Area  1
2         AAAA    1BB        0200       Mckinley Area  1
2         AAAA    1BB        0200       Mckinley Area  1
2         AAAA    1BB        0200       Mckinley Area  1
3         AAAA    1CC        0200       Mckinley Area  1
4         BBBB    1AA        0300       Southwoods     1
4         BBBB    1AA        0300       Southwoods     1
4         BBBB    1AA        0300       Southwoods     1
4         BBBB    1AA        0300       Southwoods     1
5         BBBB    1BB        0300       Southwoods     1
5         BBBB    1BB        0300       Southwoods     1
6         BBBB    1CC        0300       Southwoods     1
6         BBBB    1CC        0300       Southwoods     1

谢谢您的一贯支持！

Answer 1

一种简单的方法使用递归子查询：

with cte as (
      select Rowstamp, DocNos, ProductID, SiteCode, Description, qty, 1 as num
      from t
      union all
      select Rowstamp, DocNos, ProductID, SiteCode, Description, qty, num + 1
      from cte
      where num <= qty
     )
select Rowstamp, DocNos, ProductID, SiteCode, Description, num as qty
from cte;

Answer 2

您可以加入号码表。在这里，我使用来自sysobjects数据库的master上的查询，因为它始终存在并且可能有很多行。如果您碰巧拥有比qty中的行数大的sysobjects值，则可以使用其他方法来获取数字来源。

SELECT T.RowStamp, T.DocNos, T.ProductID, T.SiteCode, T.Description, T.qty
FROM T
  INNER JOIN (
        SELECT ROW_NUMBER() OVER (PARTITION BY 1 ORDER BY id) AS num
        FROM master.dbo.sysobjects
        ) AS B
    ON B.num <= T.qty

Answer 3

游标创建记录：

CREATE TABLE #Tags
(
    [Rowstamp] [int] NOT NULL,
    [DocNos] [nvarchar](50) NULL,
    [ProductID] [nvarchar](50) NULL,
    [SiteCode] [nvarchar](50) NULL,
    [SiteDesc] [nvarchar](50) NULL,
    [Qty] [int] NULL
) ON [PRIMARY]

Declare @RowStamp Int, @DocNos nVarChar(50),@ProductID nVarChar(50), @SiteCode nVarChar(50),@SiteDesc nVarChar(50),@Qty nVarChar(50)

DECLARE record_cursor CURSOR FOR  
  SELECT [Rowstamp], [DocNos], [ProductID], [SiteCode], [SiteDesc], [Qty]
  FROM [tbl_Tags];  

OPEN record_cursor;  

FETCH NEXT FROM record_cursor INTO
@RowStamp, @DocNos,@ProductID, @SiteCode, @SiteDesc, @Qty;  

Declare @vRecs Int
Set @vRecs = 0

WHILE @@FETCH_STATUS = 0  
BEGIN  
    While @vRecs < @Qty
    Begin
     Insert Into #Tags Values(@RowStamp, @DocNos,@ProductID, @SiteCode, @SiteDesc, 1)
     Set @vRecs = @vRecs+1
    End

    Set @vRecs = 0
    FETCH NEXT FROM record_cursor INTO @RowStamp, @DocNos,@ProductID, @SiteCode, @SiteDesc, @Qty;  
END  

Select * From #Tags 

Drop table #Tags
CLOSE record_cursor;  
DEALLOCATE record_cursor;

需要基于SQL中的Number列乘行

3 个答案: