Table from comma separated Column at two level - sql

Question

I have one old db in which there are two columns which contain comma separated values like this,
SQL FIDDLE LINK for SCHEMA
Now my problem is that I am trying to import those values into another database which is normalized. So instead of comma separated values, I need to convert those values into a tabular format .
So my output should be look like this,

Answer 1

You need to define what those columns mean. In your example are you discarding the original ID column, in which case what does "1,2,3" & "A,B" actually mean?
I'd probably approach this by cursoring through each row and using a split function to convert each field to a table of values.
create FUNCTION dbo.fn_Split1 (#sep nchar(1), #s nvarchar(4000))
RETURNS table
/**************************************************************************************************
* Author: http://stackoverflow.com/questions/314824/
* Description: splits a string into a table of values, with single-char delimiter.
* Example Usage:
select * from dbo.fn_split1(',', '1,2,5,2,,dggsfdsg,456,df,1,2,5,2,,dggsfdsg,456,df,1,2,5,2,,')
**************************************************************************************************/
AS
RETURN (
WITH Pieces(pn, start, stop) AS (
SELECT 1, 1, CHARINDEX(#sep, #s)
UNION ALL
SELECT pn + 1, stop + 1, CHARINDEX(#sep, #s, stop + 1)
FROM Pieces
WHERE stop > 0
)
SELECT pn,
SUBSTRING(#s, start, CASE WHEN stop > 0 THEN stop-start ELSE 4000 END) AS s
FROM Pieces
)

Answer 2

CREATE TABLE #RegionDetail
(
Id int identity(1,1) not null,
RegionId nvarchar(50),
Zone nvarchar(50)
)
INSERT INTO #RegionDetail (RegionId,Zone) values ('1,2,3','A,B')
INSERT INTO #RegionDetail (RegionId,Zone) values ('1,2,3','X,Y')
INSERT INTO #RegionDetail (RegionId,Zone) values ('4,3,5','A,B')
GO
create FUNCTION [dbo].[Split](#String varchar(MAX), #Delimiter char(1))
returns #temptable TABLE (items varchar(MAX))
as
begin
declare #idx int
declare #slice varchar(8000)
select #idx = 1
if len(#String)<1 or #String is null return
while #idx!= 0
begin
set #idx = charindex(#Delimiter,#String)
if #idx!=0
set #slice = left(#String,#idx - 1)
else
set #slice = #String
if(len(#slice)>0)
insert into #temptable(Items) values(#slice)
set #String = right(#String,len(#String) - #idx)
if len(#String) = 0 break
end
return
end;
GO
SELECT Id,RegionId,Zone FROM #RegionDetail
select
r.Id,f.items as RegionId,z.items as Zone
from
#RegionDetail r
cross apply [dbo].[Split](r.RegionId,',') f
cross apply [dbo].[Split](r.Zone,',') z
order by Id,RegionId,Zone