Putting comma separated values into separate or different columns - sql

Question

I have a table and values as shown here
create table #example(id int primary key identity, cols varchar(255))
insert into #example(cols) values('HI,HELLO,BYE,TC')
insert into #example(cols) values('WHAT,ARE,YOU,DOING,HERE')
I need the resultant output as shown in the picture
Note : There is no limit for values i.e dynamic

Answer 1

This is what you are expecting
Schema:
CREATE TABLE #EXAMPLE(ID INT PRIMARY KEY IDENTITY, COLS VARCHAR(255))
INSERT INTO #EXAMPLE(COLS) VALUES('HI,HELLO,BYE,TC')
INSERT INTO #EXAMPLE(COLS) VALUES('WHAT,ARE,YOU,DOING,HERE')
Do split those comma separated values into Rows and Apply pivot
SELECT * FROM (
SELECT id
, ROW_NUMBER() OVER(PARTITION BY ID ORDER BY (SELECT 1)) AS ID2
, SPLT.CLMS.value('.','VARCHAR(MAX)') AS LIST FROM (
select id
, CAST( '<M>'+REPLACE(cols,',','</M><M>')+'</M>' AS XML) AS XML_COL from #example E
)E
CROSS APPLY E.XML_COL.nodes('/M') AS SPLT(CLMS)
)A
PIVOT
(
MAX(LIST) FOR ID2 IN ([1],[2],[3],[4],[5])
)PV
You will get result as
+----+------+-------+-----+-------+------+
| id | 1 | 2 | 3 | 4 | 5 |
+----+------+-------+-----+-------+------+
| 1 | HI | HELLO | BYE | TC | NULL |
| 2 | WHAT | ARE | YOU | DOING | HERE |
+----+------+-------+-----+-------+------+
Edit:
And now you need to go for dynamic pivot,since There is no limit for values.
DECLARE #COLS VARCHAR(MAX)='', #QRY VARCHAR(MAX)='';
SELECT #COLS =#COLS+'['+CAST( ID2 AS VARCHAR(10))+'],' FROM (
SELECT DISTINCT ROW_NUMBER() OVER(PARTITION BY ID ORDER BY (SELECT 1)) AS ID2 FROM (
select id, CAST( '<M>'+REPLACE(cols,',','</M><M>')+'</M>' AS XML) AS XML_COL from #example E
)E
CROSS APPLY E.XML_COL.nodes('/M') AS SPLT(CLMS)
)A
SELECT #COLS = LEFT(#COLS,LEN(#COLS)-1)
SELECT #QRY =
'
SELECT * FROM (
SELECT id
, ROW_NUMBER() OVER(PARTITION BY ID ORDER BY (SELECT 1)) AS ID2
, SPLT.CLMS.value(''.'',''VARCHAR(MAX)'') AS LIST FROM (
select id, CAST( ''<M>''+REPLACE(cols,'','',''</M><M>'')+''</M>'' AS XML) AS XML_COL from #example E
)E
CROSS APPLY E.XML_COL.nodes(''/M'') AS SPLT(CLMS)
)A
PIVOT
(
MAX(LIST) FOR ID2 IN ('+#COLS+ ')
)PV'
EXEC( #QRY)

Answer 2

Dynamic version base on split string then pivot table
Schema:
create table #example(id int primary key identity, cols varchar(255))
insert into #example(cols) values('HI,HELLO,BYE,TC')
insert into #example(cols) values('WHAT,ARE,YOU,DOING,HERE')
Calculate columns pivot
-- Calculate dynamic columns
;WITH temps AS
(
SELECT sd.* ,CAST('<x>' + replace(sd.cols, ',', '</x><x>') + '</x>' as xml) AS xmlText
FROM #example sd
),
temps1 AS
(
SELECT t.Id, t.cols, v.x.value('.','varchar(50)') AS Value
FROM temps t
CROSS APPLY
t.xmlText.nodes('/x') AS v(x)
)
SELECT #ColumnPivot = STUFF((SELECT DISTINCT CONCAT(',COL',row_number() OVER(PARTITION BY t.id ORDER BY t.Value)) FROM temps1 t FOR XML PATH('')), 1,1,'')
PRINT #ColumnPivot
Then PIVOT table
DECLARE #query nvarchar(max) =
CONCAT(N';WITH temps AS
(
SELECT sd.* ,CAST(''<x>'' + replace(sd.cols, '','', ''</x><x>'') + ''</x>'' as xml) AS xmlText
FROM #example sd
),
temps1 AS
(
SELECT t.Id, t.cols, v.x.value(''.'' , ''varchar(50)'') AS Value
FROM temps t
CROSS APPLY
t.xmlText.nodes(''/x'') AS v(x)
),
temps2 AS
(
SELECT t.* , CONCAT(''COL'',row_number() OVER(PARTITION BY t.id ORDER BY (select 1))) AS ColGroup
FROM temps1 t
)',
N'SELECT Id, cols, ' , #ColumnPiVot,
' FROM
(
select * from temps2
) AS src
PIVOT
(MAX(Value) FOR ColGroup IN (',#ColumnPiVot,')) AS pvt')
PRINT #query
exec sp_executesql #query
DROP TABLE #example
Demo link: Rextester

Answer 3

DECLARE #COLS AS NVARCHAR(MAX),
#QUERY AS NVARCHAR(MAX);
SET #COLS = STUFF((SELECT DISTINCT ',' + QUOTENAME(C.RN)
FROM (SELECT ID,TOKEN,COLS
,ROW_NUMBER() OVER (
PARTITION BY ID ORDER BY (
SELECT NULL
)
) AS RN
FROM #EXAMPLE
CROSS APPLY (
SELECT *
FROM UDF_SPLITSTRING(COLS, ',')
) A) C
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
SET #QUERY = 'SELECT ID,cols, ' + #COLS + ' FROM
(
SELECT ID,TOKEN,cols
,ROW_NUMBER() OVER (
PARTITION BY ID ORDER BY (
SELECT NULL
)
) AS RN
FROM #EXAMPLE
CROSS APPLY (
SELECT *
FROM UDF_SPLITSTRING(COLS, '','')
) A
) X
PIVOT
(
MAX(TOKEN)
FOR rn IN (' + #COLS + ')
) P '
exec(#QUERY)
output
ID cols 1 2 3 4 5
1 HI,HELLO,BYE,TC HI HELLO BYE TC NULL
2 WHAT,ARE,YOU,DOING,HERE WHAT ARE YOU DOING HERE