How to create a View showing rows from splitted data - sql-server

Question

With a table as:
Name Num Value
----------------------
Peter 10 10
Mary 10,15 5,10
John 5,20 10,20
How can I get a result as the follow table with a View ?
Name Num Value
------------------
Peter 10 10
Mary 10 5
Mary 15 10
John 5 10
John 20 20
Notice Mary and John have multiple data (comma-delimited).
I've a function to do the split of a cell and returns a table but just for a specific row and cell, hos to iterate from all table ?
Aditional Info:
SELECT NAM.NAME, Data AS NUM, VAL.VALUE
FROM dbo.Split((SELECT NUM FROM t1 WHERE LineNum = 2), ','))
CROSS APPLY (
SELECT Id As Id1, Data AS VALUE
FROM dbo.Split((SELECT VALUE FROM t1 WHERE LineNum = 2), ','))
) AS VAL
CROSS APPLY (
SELECT NAME FROM t1 WHERE LineNum = 2
) AS NAM
WHERE Id = Id1
Note: LineNum is row number from t1
From Second Row of t1 (Mary | 10,15 | 5,10)
Previous Function returns table as:
Name Num Value
------------------
Mary 10 5
Mary 15 10
Split Function from a cell (10,15) returns:
Id Data
-----------
1 10
2 15
===============================================
My Split Function:
CREATE FUNCTION [dbo].[Split]
(
#String NVARCHAR(4000),
#Delimiter NCHAR(1)
)
RETURNS TABLE
AS
RETURN
(
WITH Split(stpos,endpos)
AS(
SELECT 0 AS stpos, CHARINDEX(#Delimiter,#String) AS endpos
UNION ALL
SELECT endpos+1, CHARINDEX(#Delimiter,#String,endpos+1)
FROM Split
WHERE endpos > 0
)
SELECT 'Id' = ROW_NUMBER() OVER (ORDER BY (SELECT 1)),
'Data' = SUBSTRING(#String,stpos,COALESCE(NULLIF(endpos,0),LEN(#String)+1)-stpos)
FROM Split
)

Answer 1

Declare #YourTable table (Name varchar(50), Num varchar(50), Value varchar(50))
Insert into #YourTable values
('Peter','10', '10'),
('Mary','10,15','5,10'),
('John','5,20', '10,20')
Select A.Name
,B.*
From #YourTable A
Cross Apply (
Select Num = A.RetVal
,Value = B.RetVal
From (
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(A.Num,',','</x><x>')+'</x>' as xml).query('.')) as A
Cross Apply x.nodes('x') AS B(i)
) A
Join (
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(A.Value,',','</x><x>')+'</x>' as xml).query('.')) as A
Cross Apply x.nodes('x') AS B(i)
) B on A.RetSeq=B.RetSeq
) B
Returns
Name Num Value
Peter 10 10
Mary 10 5
Mary 15 10
John 5 10
John 20 20
Edit - Another option with a UDF
Select A.Name
,B.*
From #YourTable A
Cross Apply (
Select Num = A.RetVal
,Value = B.RetVal
From [dbo].[udf-Str-Parse-8K](A.Num,',') A
Join [dbo].[udf-Str-Parse-8K](A.Value,',') B
on A.RetSeq=B.RetSeq
) B
The fastest UDF
CREATE FUNCTION [dbo].[udf-Str-Parse-8K] (#String varchar(max),#Delimiter varchar(10))
Returns Table
As
Return (
with cte1(N) As (Select 1 From (Values(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) N(N)),
cte2(N) As (Select Top (IsNull(DataLength(#String),0)) Row_Number() over (Order By (Select NULL)) From (Select N=1 From cte1 a,cte1 b,cte1 c,cte1 d) A ),
cte3(N) As (Select 1 Union All Select t.N+DataLength(#Delimiter) From cte2 t Where Substring(#String,t.N,DataLength(#Delimiter)) = #Delimiter),
cte4(N,L) As (Select S.N,IsNull(NullIf(CharIndex(#Delimiter,#String,s.N),0)-S.N,8000) From cte3 S)
Select RetSeq = Row_Number() over (Order By A.N)
,RetVal = Substring(#String, A.N, A.L)
From cte4 A
);
--Much faster than str-Parse, but limited to 8K
--Select * from [dbo].[udf-Str-Parse-8K]('Dog,Cat,House,Car',',')