Sql server 2005 在SQL Server中使用平面表结构的透视表,无需聚合
我有一个平面的表格结构,我把它变成了一个基于列的表格。我正在努力使原始数据中的rowId显示在基于列的表中。非常感谢您的帮助 表中的原始数据来自三个不同的表:Sql server 2005 在SQL Server中使用平面表结构的透视表,无需聚合,sql-server-2005,pivot,Sql Server 2005,Pivot,我有一个平面的表格结构,我把它变成了一个基于列的表格。我正在努力使原始数据中的rowId显示在基于列的表中。非常感谢您的帮助 表中的原始数据来自三个不同的表: | rowId |columnName |ColumnValue | | ---------------- |:---------------:| -----------:| | 1 |itemNo |1 | | 1
| rowId |columnName |ColumnValue |
| ---------------- |:---------------:| -----------:|
| 1 |itemNo |1 |
| 1 |itemName |Polo Shirt |
| 1 |itemDescription |Green |
| 1 |price1 |4.2 |
| 1 |price2 |5.3 |
| 1 |price3 |7.5 |
| 1 |displayOrder |1 |
| 1 |rowId |[NULL] |
| 2 |itemNo |12 |
| 2 |itemName |Digital Watch|
| 2 |itemDescription |Red Watch |
| 2 |price1 |4.0 |
| 2 |price2 |2.0 |
| 2 |price3 |1.5 |
| 2 |displayOrder |3 |
| 2 |rowId |[NULL] |
SQL使用pivot为我提供列结构:
select [displayOrder],[itemDescription],[itemName],[itemNo],[price1],[price2],[price3],[rowId]
from
(
SELECT [columnName], [columnValue] , row_number() over(partition by c.columnName order by cv.rowId) as rn
FROM tblFlatTable AS t
JOIN tblFlatColumns c
ON t.flatTableId = c.flatTableId
JOIN tblFlatColumnValues cv
ON cv.flatColumnId = c.flatColumnId
WHERE (t.flatTableId = 1) AND (t.isActive = 1)
AND (c.isActive = 1) AND (cv.isActive = 1)
) as S
Pivot
(
MIN([columnValue])
FOR columnName IN ([displayOrder],[itemDescription],[itemName],[itemNo],[price1],[price2],[price3],[rowId])
) as P
结果:
|displayOrder|itemDescription|itemName |price1|price2|price3|rowId |
| ---------- |:-------------:|:------------:|:----:|:----:|:----:|-----:|
|1 |Green |Polo Shirt |4.2 |5.3 |7.5 |[NULL]|
|3 |Red watch |Digital Watch |4.0 |2.0 |1.5 |[NULL]|
我明白为什么我会得到rowId的空值。我一直坚持的是,我不确定是否有可能像我看过的许多例子一样,没有一个能做到这一点,那就是从原始数据中提取rowId的值并将其添加到我的结构中。现在看起来很明显
| rowId |columnName |ColumnValue |
| ---------------- |:---------------:| -----------:|
| 1 |itemNo |1 |
| 1 |itemName |Polo Shirt |
| 1 |itemDescription |Green |
| 1 |price1 |4.2 |
| 1 |price2 |5.3 |
| 1 |price3 |7.5 |
| 1 |displayOrder |1 |
| 2 |itemNo |12 |
| 2 |itemName |Digital Watch|
| 2 |itemDescription |Red Watch |
| 2 |price1 |4.0 |
| 2 |price2 |2.0 |
| 2 |price3 |1.5 |
| 2 |displayOrder |3 |
我现在不把rowId作为我的平面结构的一部分
| rowId |columnName |ColumnValue |
| ---------------- |:---------------:| -----------:|
| 1 |itemNo |1 |
| 1 |itemName |Polo Shirt |
| 1 |itemDescription |Green |
| 1 |price1 |4.2 |
| 1 |price2 |5.3 |
| 1 |price3 |7.5 |
| 1 |displayOrder |1 |
| 2 |itemNo |12 |
| 2 |itemName |Digital Watch|
| 2 |itemDescription |Red Watch |
| 2 |price1 |4.0 |
| 2 |price2 |2.0 |
| 2 |price3 |1.5 |
| 2 |displayOrder |3 |
我已经更新了SQL,您可以看到我正在从tblFlatColumnValues中提取rowId
select [rowId],[displayOrder],[itemDescription],[itemName],[itemNo],[price1],[price2],[price3]
from
(
SELECT cv.rowId, [columnName], [columnValue] , row_number() over(partition by c.columnName order by cv.rowId) as rn
FROM tblFlatTable AS t
JOIN tblFlatColumns c
ON t.flatTableId = c.flatTableId
JOIN tblFlatColumnValues cv
ON cv.flatColumnId = c.flatColumnId
WHERE (t.flatTableId = 1) AND (t.isActive = 1)
AND (c.isActive = 1) AND (cv.isActive = 1)
) as S
Pivot
(
MIN([columnValue])
FOR columnName IN ([displayOrder],[itemDescription],[itemName],[itemNo],[price1],[price2],[price3])
) as P