使用SQL Server將行數據轉換爲列數據

Question

我想將行數據轉換爲列，其中列名不是來自數據。我認爲使用Pivot不會給我正確的解決方案。請參閱我的數據看起來像什麼和我希望它看起來的形象。

的行數的例子返回將繼續隨時間增長。

我的解決辦法： 基於@Triv說，我已經使用管理rank函數來創建一個新列，然後使用動態SQL樞紐改造數據來解決問題。

Answer 1

你可以使用動態sql + PIVOT

CREATE TABLE #SampleData 
(
    AccountNumber int, 
    Product varchar(20), 
    ProductEndDate datetime 
) 

INSERT INTO #SampleData VALUES (1,'Fixed 10','2016-01-01'),(1,'Fixed 11','2016-02-01'),(1,'Fixed 13','2016-03-01'),(1,'Fixed 12','2016-04-01'), 
         (2,'Fixed 10','2016-01-01'),(2,'Fixed 11','2016-02-01'),(2,'Fixed 13','2016-03-01') 

DECLARE @HeaderAll nvarchar(max) 
DECLARE @ColumnPivotProduct nvarchar(max) 
DECLARE @ColumnPivotProductEndDate nvarchar(max) 

;WITH temp AS 
(
    SELECT DISTINCT 
    CONCAT('Product' ,row_number() OVER(PARTITION BY sd.AccountNumber ORDER BY sd.Product)) AS ProductGroup, 
    CONCAT('ProductEndDate' ,row_number() OVER(PARTITION BY sd.AccountNumber ORDER BY sd.Product)) AS ProductEndDateGroup 
    FROM #SampleData sd 
) 
SELECT @HeaderAll = STUFF((SELECT CONCAT(',',t.ProductGroup,'= MAX(',t.ProductGroup, '),', t.ProductEndDateGroup ,'= MAX(', t.ProductEndDateGroup,')') FROM temp t FOR XML PATH('')), 1,1,''), 
    @ColumnPivotProduct = STUFF((SELECT CONCAT(',',t.ProductGroup) FROM temp t FOR XML PATH('')), 1,1,''), 
    @ColumnPivotProductEndDate = STUFF((SELECT CONCAT(',', t.ProductEndDateGroup) FROM temp t FOR XML PATH('')), 1,1,'') 

--SELECT @HeaderAll, @ColumnPivotProduct, @ColumnPivotProductEndDate 


DECLARE @query nvarchar(max) = CONCAT(
     ';WITH temp AS 
     (
      SELECT *, 
      CONCAT(''Product'' ,row_number() OVER(PARTITION BY sd.AccountNumber ORDER BY sd.Product)) AS ProductGroup, 
      CONCAT(''ProductEndDate'' ,row_number() OVER(PARTITION BY sd.AccountNumber ORDER BY sd.Product)) AS ProductEndDateGroup 
      FROM #SampleData sd 
     ) 
     SELECT AccountNumber, ',@HeaderAll,' FROM   
      (
      SELECT t.AccountNumber, t.Product, t.ProductEndDate, t.ProductGroup,t.ProductEndDateGroup FROM temp t 
     ) src 
      PIVOT 
      (
      MIN(Product) FOR ProductGroup IN (',@ColumnPivotProduct,')  
     ) pvt 
      PIVOT 
      (
      MIN(ProductEndDate) FOR ProductEndDateGroup IN (',@ColumnPivotProductEndDate,')  
     ) pvt1 
     GROUP BY AccountNumber   
     ') 

PRINT @query 
exec(@query) 


DROP TABLE #SampleData 

演示鏈接：http://rextester.com/AEQBZ56634

注：CONCAT是SQL服務器2012+繳費。如果您使用的是舊版本，然後使用+爲串聯串

Answer 2

它的工作原理，檢查了這一點，而不是@testTable使用你的表名

declare @temptable varchar(1000) = 'declare @tempTable1 table (', 

@inserStatement varchar(1000) = 'insert into @tempTable1 (', 

@insertValues varchar(1000) = '' 

DECLARE @AcountNumber VARCHAR(50),@Product varchar(40),@ProductEndData varchar(50), @increment int = 0; 

DECLARE db_cursor CURSOR FOR 
select 
Product, 
ProductEndData from @testTable 

OPEN db_cursor 
FETCH NEXT FROM db_cursor INTO @Product, @ProductEndData 

WHILE @@FETCH_STATUS = 0 
BEGIN 
set @increment = @increment+1; 
     SET @temptable += 'Product'+ cast(@increment as varchar) +' varchar(100),' + 'Product' + cast(@increment as varchar) + 'EndDate varchar(100),' ; 
     set @inserStatement += 'Product'+ cast(@increment as varchar) +',' + 'Product' + cast(@increment as varchar) + 'EndDate,'; 

     set @insertValues += '(''' + @Product +''''+ ',' + ''''+ @ProductEndData + '''' + ')'; 


     FETCH NEXT FROM db_cursor INTO @Product, @ProductEndData 

END 

CLOSE db_cursor 
DEALLOCATE db_cursor 

set @temptable = STUFF(@temptable, LEN(@temptable), 1, ')') 
set @inserStatement = STUFF(@inserStatement, LEN(@inserStatement), 1, ')') 
set @insertValues = replace(@insertValues, ')(', ',') 
exec (@temptable + @inserStatement + ' values ' + @insertValues + 'select * from @tempTable1')