Question

I have a table as below

DECLARE @T TABLE(Data VARCHAR(MAX))
INSERT INTO @T
SELECT 'SQL' UNION ALL SELECT 'JOB'

need output as below but without using any UDF.

Data  String
------------
SQL   S,Q,L
JOB   J,O,B

Please help me on this

Answer 1

Sure you can :). You can make it shorter too…

DECLARE @T TABLE(Data VARCHAR(MAX))
INSERT INTO @T
SELECT 'SQL' UNION ALL SELECT 'JOB';    

With cte as
(
    Select Data, Len(Data) DataLength, 1 level
    From @t
    Union All 
    Select Data, DataLength - 1, level + 1
    From cte
    Where DataLength > 1 
),
cte2 as
(
    Select Data, SUBSTRING(Data, DataLength, 1) DataLetter, level
    From cte
),
cte3 as
(
    Select Data, 
        (
            SELECT DataLetter + ','
            FROM cte2 c
            Where c.Data = cte2.Data
            Order By level desc
            FOR XML PATH(''), TYPE

        ).value('.[1]', 'NVARCHAR(1000)') DataComa
    From cte2
    Group By Data
)
Select Data, substring(DataComa, 1, Len(DataComa) - 1) Data2
From cte3