Split multiple comma separated columns into rows - sql

Question

I have one table (SQL Server), which has comma separated values in multiple columns, like below:
Rule_ID ListType_ID Values
1 1,2 100,200
2 3,4 300,400
I want to split the comma separated values and convert them into rows.
The required output must be like below:
Rule_ID ListType_ID Values
1 1 100
1 2 200
2 3 300
2 4 400
I have tried the below query:
DECLARE #TEMP AS TABLE (
[Rule_ID] INT,
[ListType_ID] VARCHAR(MAX),
[Values] VARCHAR(MAX)
)
INSERT INTO #TEMP
SELECT 1, '1,2', '100,200'
UNION ALL
SELECT 2, '3,4', '300,400'
SELECT
[Rule_ID],
PARSENAME(REPLACE(Split1.b.value('.', 'VARCHAR(100)'),'-','.'),1) AS [ListType_ID],
PARSENAME(REPLACE(Split.a.value('.', 'VARCHAR(100)'),'-','.'),1) AS [Values]
FROM
(
SELECT [Rule_ID],
CAST ('<M>' + REPLACE([ListType_ID], ',', '</M><M>') + '</M>' AS XML) AS [ListType_ID],
CAST ('<M>' + REPLACE([Values], ',', '</M><M>') + '</M>' AS XML) AS [Values]
FROM #TEMP
) AS A
CROSS APPLY [Values].nodes ('/M') AS Split(a)
CROSS APPLY [ListType_ID].nodes ('/M') AS Split1(b)
ORDER BY [Rule_ID], [ListType_ID], [Values]
This query returns the below output, which is different from the required output:
Rule_ID ListType_ID Values
1 1 100
1 1 200
1 2 100
1 2 200
2 3 300
2 3 400
2 4 300
2 4 400
Please help me here....!!!!

Answer 1

Please check following SQL script
To split string in SQL I used one of the following user-defined SQL split string functions
These functions return the order of the splitted string which I used in WHERE clause so I can map field values one-to-one
/*
create table Table_1 (
Rule_ID int, ListType_ID varchar(max), [Values] varchar(max)
)
insert into Table_1 select 1,'1,2','100,200'
insert into Table_1 select 2,'3,4','300,400'
*/
select
Rule_ID,
idlist.val as ListType_ID,
valueslist.val as [Values]
from Table_1
cross apply dbo.SPLIT(ListType_ID,',') as idlist
cross apply dbo.SPLIT([Values],',') as valueslist
where
idlist.id = valueslist.id

Answer 2

Using CTE, a double CROSS APPLY and XML based split you can use this script:
;WITH Splitted AS
(
SELECT
[Rule_ID]
,CAST('<x>' + REPLACE([ListType_ID],',','</x><x>') + '</x>' AS XML) AS [ListType_ID_Val]
,CAST('<x>' + REPLACE([Values],',','</x><x>') + '</x>' AS XML) AS [Values_Val]
FROM #TEMP
)
SELECT
Rule_ID, cs.VAL as[ListType_ID], cd.VAL as [Values]
FROM Splitted
CROSS APPLY (VALUES ('a',ListType_ID_Val.value(N'/x[1]','int') ),
('b',ListType_ID_Val.value(N'/x[2]','int') )
)CS (COL,VAL)
CROSS APPLY (VALUES ('a',Values_Val.value(N'/x[1]','int') ),
('b',Values_Val.value(N'/x[2]','int') )
)CD (COL,VAL)
where CS.COL = CD.COL
Results: