Question

我有一个表具有以下结构的项目：

code  name     price    
001   item1    113      
002   item2    90      
003   item3    45        
004   item4    47

我需要这样做：

code           001         002        003           004  
name           item1       item2      item3         item4
price          113         90         45             47

我怎样才能实现这一目标？

Answer 1

您可以使用PIVOT和UNION

DECLARE @MyTable TABLE (code VARCHAR(10),  name VARCHAR(10),    price INT)   
INSERT INTO @MyTable VALUES
('001','item1', 113),     
('002','item2', 90 ),    
('003','item3', 45 ),      
('004','item4', 47 ) 


SELECT header as code, [001], [002], [003], [004] FROM (
     SELECT 'name' header, code, name val FROM @MyTable  
     UNION ALL
     SELECT 'price' header, code, CONVERT(VARCHAR(10),price) val FROM @MyTable
 )SRC PIVOT( MAX(val) FOR code IN ( [001], [002], [003], [004])) PVT

结果：

code  001        002        003        004
----- ---------- ---------- ---------- ----------
name  item1      item2      item3      item4
price 113        90         45         47

Answer 2

@zineddine reda，尝试使用以下查询，你可以使用sql提供的pivot功能来实现它

declare @Tbl table (code varchar(50), name varchar(50), Price int)
insert into @Tbl values ('001', 'item1', 113)
insert into @Tbl values ('002', 'item2', 90)
insert into @Tbl values ('003', 'item3', 45)
insert into @Tbl values ('004', 'item4', 47)

declare @Tbl1 table (ItemNAme nvarchar(50), ItemVal nvarchar(50))
insert into @Tbl1 
  Select 'Code',  
        STUFF((SELECT ', ' + Code
        FROM @Tbl 
        FOR XML PATH('')), 1, 1, '')  
  from @Tbl
insert into @Tbl1 
  select 'Name', 
         STUFF((SELECT ', ' + name
         FROM @Tbl 
         FOR XML PATH('')), 1, 1, '')
   from @Tbl
insert into @Tbl1 
   select 'Price', 
          STUFF((SELECT ', ' +  Convert(nvarchar(50),Price)
          FROM @Tbl 
          FOR XML PATH('')), 1, 1, '') 
    from @Tbl

IF OBJECT_ID('tempdb..#Emp','U') IS NOT NULL DROP TABLE #Emp

SELECT E.*, P.Value AS ItemValue, 'ItemValue' + CONVERT(VARCHAR(10),P.ID) AS ItemValueID, P.ID AS ID
INTO #Emp
FROM @Tbl1 E OUTER APPLY dbo.fnSplit1(E.ItemVal,',') P
DECLARE @MaxID INT, @Cols VARCHAR(MAX), @SQL NVARCHAR(MAX), @i INT
SELECT @MaxID = MAX(ID) FROM #Emp 
SET @i = 1
SET @Cols = ''
WHILE @i <=@MaxID
   BEGIN
      SET @Cols = @Cols + ', [ItemValue' + CONVERT(VARCHAR(10), @i) + ']'
      SET @i = @i + 1
   END
SET @Cols = RIGHT(@Cols, LEN(@Cols)-2)
print @Cols
SELECT @SQL = 'select ItemNAme, ' + @Cols + ' 
FROM (select ItemNAme, ItemVal, ItemValue, ItemValueID from #Emp) src
PIVOT (max(ItemValue) for ItemValueID IN (' + @Cols + '))pvt'
PRINT @SQL

EXECUTE (@SQL)

并且你的fnSplit1函数将是

CREATE FUNCTION [dbo].[FnSplit1]
(
@List nvarchar(2000),
@SplitOn nvarchar(5)
)  
RETURNS @RtnValue table 
(
Id int identity(1,1),
Value nvarchar(100)
) 
AS  
BEGIN
   While (Charindex(@SplitOn,@List)>0)
   Begin 
       Insert Into @RtnValue (value)
       Select
       Value = ltrim(rtrim(Substring(@List,1,Charindex(@SplitOn,@List)-1))) 
       Set @List = Substring(@List,Charindex(@SplitOn,@List)+len(@SplitOn),len(@List))
   End 

   Insert Into @RtnValue (Value)
   Select Value = ltrim(rtrim(@List))
   Return
END

TSQL将行转换为列

2 个答案: