Is it possible to compare comma delimited string in T-SQL without looping?

Question

Let\'s say I have 2 tables where both has column called Brand. The value is comma delimited so for example if one of the table has

ACER,ASUS,HP  
         


        

Answer 1

Had the same problem with comparing "," delimited strings

you can use "XML" to do that and compare the outputs and return the same/different value:

declare  @TestInput nvarchar(255)
, @TestInput2 nvarchar(255)

set @TestInput = 'ACER,ASUS,HP'
set @TestInput2 = 'HP,GIGABYTE'



;WITH FirstStringSplit(S1) AS
(
 SELECT CAST('' + REPLACE(@TestInput,',','') + '' AS XML)
)
,SecondStringSplit(S2) AS
(
SELECT CAST('' + REPLACE(@TestInput2,',','') + '' AS XML)
 )

 SELECT STUFF(
 (
SELECT ',' + part1.value('.','nvarchar(max)')
FROM FirstStringSplit
CROSS APPLY S1.nodes('/x') AS A(part1)
WHERE part1.value('.','nvarchar(max)') IN(SELECT B.part2.value('.','nvarchar(max)')
                                              FROM SecondStringSplit 
                                              CROSS APPLY S2.nodes('/x') AS B(part2)
                                              ) 
FOR XML PATH('')
),1,1,'') as [Same Value]

Edit:

Changed 'Stuff' to 'XML'