问题
I want to create function to split the value of a column (sku) in TBL_Sku to any column (Sku1, 2, 3, 4, ...) in another table (TBL_Sku2)
Column sku in the TBL_SkU:
Row1 in column Des : 1-Acer Aspire 3811TZG 1GB DDR3-1066 PC8500 Memory Module,SKU:
1GBDDR3-1066-21,&2-Acer Aspire 3811TZG 2GB DDR3-1066 PC8500 Memory Module,SKU:
2GBDDR3-1066-21,&3-Acer Aspire 3811TZG 4GB DDR3-1066 PC8500 Memory Module,SKU:
4GBDDR3-1066-414,&
and row 2 in column Des : 1-SKU: 512MBDDR2-533-1038,Sony VAIO PCG-1J1L 512MB DDR2-533 PC4200 Memory Module,&
and row 3 in column Des :1-MSI S271 1GB DDR2-533 PC4200 Memory Module,SKU: 1GBDDR2-533-1068,&2-MSI S271 512MB DDR2-533 PC4200 Memory Module,SKU: 512MBDDR2-533-1033,&
Output :
TBL_Sku2:
id sku1 sku2 sku3 sku4 sku5
--- ----------- ----------------- ------------------- ----------------- ---------
1 1GBDDR3-1066-21 2GBDDR3-1066-21 4GBDDR3-1066-414 Null Null
2 512MBDDR2-533-1038 null null null null
3 1GBDDR2-533-1068 512MBDDR2-533-1033 Null Null Null
I want to professional function. Send for you my code later. Use in substring and charindex
sp :
ALTER PROCEDURE [dbo].[SP_SpilitSKU]
(@ID int ,@SKU nvarchar(Max) )
AS
BEGIN
Declare @YourTable table (ID int,SKU varchar(max))
Insert Into @YourTable values
(@ID,@SKU)
;with cte as (
Select A.ID
,RN = Row_Number() over (Partition By ID Order by RetSeq)
,SKU = LTrim(RTrim(Replace(RetVal,'SKU:','')))
From @YourTable A
Cross Apply (
Select RetSeq = Row_Number() over (Order By (Select null))
,RetVal = LTrim(RTrim(B.i.value('(./text())[1]', 'varchar(max)')))
From (Select x = Cast('<x>'+ replace((Select A.SKU as [*] For XML Path('')),',','</x><x>')+'</x>' as xml).query('.')) as A
Cross Apply x.nodes('x') AS B(i)
) B
Where RetVal like 'SKU:%'
)
INSERT INTO [dbo].[TBL_Sku]
(id
,[SKU1]
,[SKU2]
,[SKU3]
,[SKU4]
,[SKU5]
,[SKU6]
)
Select ID,[1] as SKU1,[2] as SKU2,[3] as SKU3,[4] as SKU4,[5] as SKU5,[6] as SKU6
From cte
Pivot (max(SKU) For [RN] in ([1],[2],[3],[4],[5],[6]) ) p
SP :
ALTER PROCEDURE [dbo].[SP_CreateTableSku4Column]
AS
BEGIN
declare @DesOrginal as nvarchar(max);
Declare @i as int = 0;
Declare @Count as int = (select COUNT(des) from TBL_Product_Test);
while (@i<= @Count)
Begin
WITH TBL_SKUTemp AS
(
SELECT
ROW_NUMBER() OVER( ORDER BY (SELECT null)) AS 'RowNumber',[des]
FROM TBL_Product_Test
)
SELECT @DesOrginal = [des]
FROM TBL_SKUTemp
WHERE RowNumber = @i+1;
set @i = @i+1;
EXECUTE [dbo].[SP_SpilitSKU] @i,@DesOrginal ;
END
END
count column Des in the Table = 15563
affect in the TBL_Sku = 8449
(1 row(s) affected)
8449
15563
des = 1-Samsung NP940X5JI (NP940X5J-S01US) 4GB DDR3L-1600 PC12800 1.35V Memory Module,SKU: 4GBDDR3L-1600-9,&
(1 row(s) affected)
(0 row(s) affected)
8450
15563
des = 1-SKU: 512MBDDR2-533-1038,Sony VAIO PCG-1J1L 512MB DDR2-533 PC4200 Memory Module,&
other Method :
declare @DesOrginal as nvarchar(max);
Declare @i as int = 0;
Declare @Count as int = (select COUNT(des) from TBL_Product_Test);
while (@i<= @Count)
begin
WITH TBL_SKUTemp AS
(
SELECT
ROW_NUMBER() OVER( ORDER BY (SELECT null)) AS 'RowNumber',[des]
FROM TBL_Product_Test
)
SELECT @DesOrginal = [des]
FROM TBL_SKUTemp
WHERE RowNumber = @i+1;
set @i = @i+1;
DECLARE @str VARCHAR(8000)=@DesOrginal,
@col_list VARCHAR(1000)='',
@sql NVARCHAR(max)
SET @col_list =(SELECT Concat(',', Quotename(Concat('sku', Row_number()
OVER(
ORDER BY ItemNumber))))
FROM dbo.Delimitedsplit8k(@str, ',sku:')
WHERE Item LIKE 'sku:%'
FOR xml path(''))
SET @col_list = Stuff(@col_list, 1, 1, '')
SET @sql = 'SELECT *
FROM (SELECT Concat(''sku'',Row_number()OVER(ORDER BY ItemNumber)) rn,
Stuff(item, 1, 5, '''') AS item
FROM dbo.Delimitedsplit8k(@str, '',sku:'')
WHERE Item LIKE ''sku:%'') a
PIVOT (Max(item)
FOR rn IN (' + @col_list + ')) pv '
--PRINT @sql
EXEC Sp_executesql
@sql,
N'@str VARCHAR(8000)',
@str= @str
INSERT INTO [dbo].[TBL_Sku6]
([SKU1]
,[SKU2]
,[SKU3]
,[SKU4]
,[SKU5]
)SELECT *
FROM (SELECT Concat('sku',Row_number()OVER(ORDER BY ItemNumber)) rn,
Stuff(item, 1, 5, '') AS item
FROM dbo.Delimitedsplit8k(@str, ',sku:')
WHERE Item LIKE 'sku:%') a
PIVOT (Max(item)
FOR rn IN (" + @col_list + ")) pv
print @i
print @Count
--print @str
--print RowNumber
print 'des = '+@DesOrginal
--PRINT @sql
----print SKU
----print RetVal
----print RetSeq
------print cte
end
TBL_Sku6:
TABLE [dbo].[TBL_Sku6](
[SKU1] [varchar](7996) NULL,
[SKU2] [varchar](7996) NULL,
[SKU3] [varchar](7996) NULL,
[SKU4] [varchar](7996) NULL,
[SKU5] [varchar](7996) NULL,
[SKU6] [varchar](7996) NULL
) ON [PRIMARY]
Error
The select list for the INSERT statement contains fewer items than the insert list. The number of SELECT values must match the number of INSERT columns.
回答1:
Here's a table-valued function you can use:
CREATE FUNCTION dbo.tvfn_Extract_SKUs(
@SKU_Line NVARCHAR(MAX)
)
RETURNS TABLE
AS
RETURN
WITH sku_starts AS (
SELECT CHARINDEX(':', @SKU_Line) + 2 AS SKU_1_Start
,CHARINDEX(':', @SKU_Line, CHARINDEX(':', @SKU_Line) + 2) + 2 AS SKU_2_Start
,CHARINDEX(':', @SKU_Line, CHARINDEX(':', @SKU_Line, CHARINDEX(':', @SKU_Line) + 2) + 2) + 2 AS SKU_3_Start
,CHARINDEX(':', @SKU_Line, CHARINDEX(':', @SKU_Line, CHARINDEX(':', CHARINDEX(':', @SKU_Line) + 2) + 2) + 2) + 2 AS SKU_4_Start
)
SELECT SUBSTRING(@SKU_Line, s.SKU_1_Start, CHARINDEX(',', @SKU_Line, s.SKU_1_Start) - s.SKU_1_Start) AS SKU_1
,CASE WHEN SKU_2_Start > SKU_1_Start THEN SUBSTRING(@SKU_Line, s.SKU_2_Start, CHARINDEX(',', @SKU_Line, s.SKU_2_Start) - s.SKU_2_Start) END SKU_2
,CASE WHEN SKU_3_Start > SKU_2_Start THEN SUBSTRING(@SKU_Line, s.SKU_3_Start, CHARINDEX(',', @SKU_Line, s.SKU_3_Start) - s.SKU_3_Start) END AS SKU_3
,CASE WHEN SKU_4_Start > SKU_3_Start THEN SUBSTRING(@SKU_Line, s.SKU_4_Start, CHARINDEX(',', @SKU_Line, s.SKU_4_Start) - s.SKU_4_Start) END AS SKU_4
FROM sku_starts s
回答2:
Variant 1. Example with delimiter &. When I see other answers I have to add some simple method. Script without data definition have only few rows. You should use simple and efective methods.
data definition
if object_id('tempdb..#TblTestStr') is not null drop table #TblTestStr create table #TblTestStr (MyStr varchar(max)) insert into #TblTestStr values ('Value1&Value2&Value3&Value4&'), ('Value2&Value3&Value0&'), ('Value1&'), ('Value3&Value4&')whole working with string
update #TblTestStr set MyStr = '<element>' + replace(MyStr, '&','</element><element>') + '</element>'data selection
select x.xcol.value('(./element)[1]', 'varchar(800)') col1, x.xcol.value('(./element)[2]', 'varchar(800)') col2, x.xcol.value('(./element)[3]', 'varchar(800)') col3, x.xcol.value('(./element)[4]', 'varchar(800)') col4 from (select cast(MyStr as xml) from #TblTestStr) x (xcol)
If you would like to use charindex and substring functions you have to check too much attributes.
Variant 2. One select statement.
select
x.xcol.value('(./element)[1]', 'varchar(800)'),
x.xcol.value('(./element)[2]', 'varchar(800)'),
x.xcol.value('(./element)[3]', 'varchar(800)'),
x.xcol.value('(./element)[4]', 'varchar(800)')
from (
select cast('<element>' + replace(MyStr, '&','</element><element>') + '</element>' as xml)
from #TblTestStr) x (xcol)
Solution with xquery can be very efective and easily scalable.
回答3:
Here is one method which will PARSE and then PIVOT (not dynamic, but easy to expand to a max number of SKUs)
Declare @YourTable table (ID int,SKU varchar(max))
Insert Into @YourTable values
(1,'1-Acer Aspire 3811TZG 1GB DDR3-1066 PC8500 Memory Module,SKU: 1GBDDR3-1066-21,&2-Acer Aspire 3811TZG 2GB DDR3-1066 PC8500 Memory Module,SKU: 2GBDDR3-1066-21,&3-Acer Aspire 3811TZG 4GB DDR3-1066 PC8500 Memory Module,SKU: 4GBDDR3-1066-414,&')
Select [ID],[Hits],[1] as SKU1,[2] as SKU2,[3] as SKU3,[4] as SKU4
From (
Select A.ID
,Hits = sum(1) over (Partition By ID)
,RN = Row_Number() over (Partition By ID Order by RetSeq)
,SKU = LTrim(RTrim(Replace(RetVal,'SKU:','')))
From @YourTable A
Cross Apply (
Select RetSeq = Row_Number() over (Order By (Select null))
,RetVal = B.i.value('(./text())[1]', 'varchar(max)')
From (Select x = Cast('<x>'+ replace((Select A.SKU as [*] For XML Path('')),',','</x><x>')+'</x>' as xml).query('.')) as A
Cross Apply x.nodes('x') AS B(i)
) B
Where RetVal like 'SKU:%'
) S
Pivot (max(SKU) For [RN] in ([1],[2],[3],[4]) ) p
Returns
ID Hits SKU1 SKU2 SKU3 SKU4
1 3 1GBDDR3-1066-21 2GBDDR3-1066-21 4GBDDR3-1066-414 NULL
回答4:
Here is a dynamic approach
DECLARE @str VARCHAR(8000)='1-Acer Aspire 3811TZG 1GB DDR3-1066 PC8500 Memory Module,SKU: 1GBDDR3-1066-21,&2-Acer Aspire 3811TZG 2GB DDR3-1066 PC8500 Memory Module,SKU: 2GBDDR3-1066-21,&3-Acer Aspire 3811TZG 4GB DDR3-1066 PC8500 Memory Module,SKU: 4GBDDR3-1066-414,&',
@col_list VARCHAR(1000)='',
@sql NVARCHAR(max)
SET @col_list =(SELECT Concat(',', Quotename(Concat('sku', Row_number()
OVER(
ORDER BY ItemNumber))))
FROM dbo.Delimitedsplit8k(@str, ',sku:')
WHERE Item LIKE 'sku:%'
FOR xml path(''))
SET @col_list = Stuff(@col_list, 1, 1, '')
SET @sql = 'SELECT * into TBL_Sku2
FROM (SELECT Concat(''sku'',Row_number()OVER(ORDER BY ItemNumber)) rn,
Stuff(item, 1, 5, '''') AS item
FROM dbo.Delimitedsplit8k(@str, '',sku:'')
WHERE Item LIKE ''sku:%'') a
PIVOT (Max(item)
FOR rn IN (' + @col_list + ')) pv '
PRINT @sql
EXEC Sp_executesql
@sql,
N'@str VARCHAR(8000)',
@str= @str
Result :
+-----------------+-----------------+------------------+
| sku1 | sku2 | sku3 |
+-----------------+-----------------+------------------+
| 1GBDDR3-1066-21 | 2GBDDR3-1066-21 | 4GBDDR3-1066-414 |
+-----------------+-----------------+------------------+
Consider normalizing your table structure to parse data easier. Have a separate table for sku number and value
I have used split string function to split the records for each sku.
Create FUNCTION [dbo].[DelimitedSplit8K]
(@pString VARCHAR(8000), @pDelimiter CHAR(1))
RETURNS TABLE WITH SCHEMABINDING AS
RETURN
--===== "Inline" CTE Driven "Tally Table" produces values from 0 up to 10,000...
-- enough to cover NVARCHAR(4000)
WITH E1(N) AS (
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
), --10E+1 or 10 rows
E2(N) AS (SELECT 1 FROM E1 a, E1 b), --10E+2 or 100 rows
E4(N) AS (SELECT 1 FROM E2 a, E2 b), --10E+4 or 10,000 rows max
cteTally(N) AS (--==== This provides the "base" CTE and limits the number of rows right up front
-- for both a performance gain and prevention of accidental "overruns"
SELECT TOP (ISNULL(DATALENGTH(@pString),0)) ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) FROM E4
),
cteStart(N1) AS (--==== This returns N+1 (starting position of each "element" just once for each delimiter)
SELECT 1 UNION ALL
SELECT t.N+1 FROM cteTally t WHERE SUBSTRING(@pString,t.N,1) = @pDelimiter
),
cteLen(N1,L1) AS(--==== Return start and length (for use in substring)
SELECT s.N1,
ISNULL(NULLIF(CHARINDEX(@pDelimiter,@pString,s.N1),0)-s.N1,8000)
FROM cteStart s
)
--===== Do the actual split. The ISNULL/NULLIF combo handles the length for the final element when no delimiter is found.
SELECT ItemNumber = ROW_NUMBER() OVER(ORDER BY l.N1),
Item = SUBSTRING(@pString, l.N1, l.L1)
FROM cteLen l
;
Referred from http://www.sqlservercentral.com/articles/Tally+Table/72993/
来源：https://stackoverflow.com/questions/41661155/how-to-split-value-of-column-to-dynamic-column-in-sql-server