SQL Server 2012 Comma Parsing - sql-server

Question

I'm trying to parse some comma separated values from a column in SQL Server 2012 while still keeping the data from the columns in the left and to the right.
I have seen some similar topic solutions but none seemed to be what I am looking for.
I have this:
FirstName LastName userid Regions ViewCosts HelpReviewCosts
---------------------------------------------------------------------
Darron Peters ya00003 All y y
John Davies ya30982 NA, EM, AP, LA n n
I am trying to parse the Regions column so that I can get this:
FirstName LastName userid Regions ViewCosts HelpReviewCosts
---------------------------------------------------------------------
Darron Peters ya00003 All y y
John Davies ya30982 NA n n
John Davies ya30982 EM n n
John Davies ya30982 AP n n
John Davies ya30982 LA n n

Answer 1

There are thousands of examples on how to split/parse strings. Below are two samples, one with a UDF and the other without. Both use a CROSS APPLY
With a UDF
Declare #Yourtable table (FirstName varchar(25) ,LastName varchar(25),userid varchar(25), Regions varchar(50), ViewCosts varchar(25), HelpReviewCosts varchar(25))
Insert Into #Yourtable values
('Darron','Peters','ya00003','All','y','y'),
('John','Davies','ya30982','NA, EM, AP, LA','n','n')
Select A.FirstName
,A.LastName
,A.userid
,Regions =B.RetVal
,A.ViewCosts
,A.HelpReviewCosts
From #Yourtable A
Cross Apply [dbo].[udf-Str-Parse](A.Regions,',') B
Without A UDF
Select A.FirstName
,A.LastName
,A.userid
,Regions =B.RetVal
,A.ViewCosts
,A.HelpReviewCosts
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.Regions as [*] For XML Path('')),',','</x><x>')+'</x>' as xml).query('.')) as A
Cross Apply x.nodes('x') AS B(i)
) B
Both Returns
THE UDF if needed
CREATE FUNCTION [dbo].[udf-Str-Parse] (#String varchar(max),#Delimiter varchar(10))
Returns Table
As
Return (
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 #String as [*] For XML Path('')),#Delimiter,'</x><x>')+'</x>' as xml).query('.')) as A
Cross Apply x.nodes('x') AS B(i)
);
--Select * from [dbo].[udf-Str-Parse]('Dog,Cat,House,Car',',')
--Select * from [dbo].[udf-Str-Parse]('John Cappelletti was here',' ')
--Select * from [dbo].[udf-Str-Parse]('this,is,<test>,for,< & >',',')

Answer 2

I suggest you to use STRING_SPLIT function
WITH
CTE_Sample AS
(
SELECT 'All' AS txt
UNION ALL
SELECT 'NA, EM, AP, LA' AS txt
)
SELECT
txt,
value
FROM CTE_Sample
CROSS APPLY STRING_SPLIT(txt, ',');

Answer 3

If you don't want to 'udf' and 'string_split' function,then you can use this query.and it's suitable for large strings with comma separated and also much faster compared to others...
`CREATE TABLE TB (Number INT)
DECLARE #I INT=0
WHILE #I<1000
BEGIN
INSERT INTO TB VALUES (#I)
SET #I=#I+1
END
SELECT
FirstName
,LastName
,userid
,S_DATA
,ViewCosts
,HelpReviewCosts
FROM (
SELECT
FirstName
,LastName
,userid
,CASE WHEN LEN(LIST2)>0 THEN LTRIM(RTRIM(SUBSTRING(LIST2, NUMBER+1, CHARINDEX(',', LIST2, NUMBER+1)-NUMBER - 1)))
ELSE NULL
END AS S_DATA
,ViewCosts
,HelpReviewCosts
,NUMBER
FROM(
SELECT FirstName
,LastName
,userid
,','+Regions+',' LIST2
,ViewCosts
,HelpReviewCosts
FROM Tb1
)DT
LEFT OUTER JOIN TB N ON (N.NUMBER < LEN(DT.LIST2)) OR (N.NUMBER=1 AND DT.LIST2 IS NULL)
WHERE SUBSTRING(LIST2, NUMBER, 1) = ',' OR LIST2 IS NULL
) DT2
WHERE S_DATA<>''
this is my Output