split a string in a column and pivot in sql - sql

Question

I am using sql server 2014 and I have a table like this (##tt_allresults)
ID | Area | Event |
1 | FB1 | Dev_Chg, Old Value: 0, New Value: 50, Workstation: Blah1, Function: Blah1 func |
1 | FB2 | Dev_Chg, Old Value: 99, New Value: 5, Workstation: Blah2, Function: Blah2 func |
1 | FB1 | Dev_Chg, Old Value: 50, New Value: 55, Workstation: Blah1, Function: Blah1 func |
I would like to from a table like so (Expected Output)
Area | Old Value | New Value | Function |
FB1 | 0 | 50 | Blah1 func |
FB2 | 99 | 5 | Blah2 func |
FB1 | 50 | 55 | Blah1 func |
This is what i have tried so far
Declare #id int
WHILE EXISTS(SELECT * FROM ##tt_allresults)
BEGIN
Select Top 1 #id = Id from ##tt_allresults
-- Do the work --
Declare #area nvarchar(100)
set #area = (Select Area from ##tt_allresults where id = #id)
Insert into ##tt_changedetails
select #area, * from fnsplit((Select [event] from ##tt_allresults where id = #id),',')
-- Scrap the ID and Move On --
Delete ##tt_allresults where ID = #id
END
select * from ##tt_changedetails
I get the following result
Area | ChangeDetails |
FB1 | Dev_Chg |
FB1 | Old value :0 |
FB1 | New Value :50 |
FB1 | Workstation :blah1 |
FB1 | Function :blah1 func |
FB2 | Dev_Chg |
FB2 | Old value :99 |
FB2 | New Value :5 |
FB2 | Workstation :blah2 |
FB2 | Function :blah2 func |
FB1 | Dev_Chg |
FB1 | Old value :50 |
FB1 | New Value :55 |
FB1 | Workstation :blah1 |
FB1 | Function :blah1 func |
How do i split my initial table and pivot it based on the split. I want to see the following result
FB1 | 0 | 50 | Blah1 func |
FB2 | 99 | 5 | Blah2 func |
FB1 | 50 | 55 | Blah1 func |

Answer 1

No need for a UDF, can all be done with the help of a CROSS APPLY and an a little XML
You can expand or contract as needed. I left 9 Positions to illustrate
1) Without a Function
Declare #YourTable table (ID int,Area varchar(25),Event varchar(500))
Insert Into #YourTable values
(1,'FB1','Dev_Chg, Old Value: 0, New Value: 50, Workstation: Blah1, Function: Blah1 func'),
(1,'FB2','Dev_Chg, Old Value: 99, New Value: 5, Workstation: Blah2, Function: Blah2 func'),
(1,'FB1','Dev_Chg, Old Value: 50, New Value: 55, Workstation: Blah1, Function: Blah1 func')
Select A.Area
,[Old Value] = Substring(Pos2,CharIndex(':',Pos2)+1,Len(Pos2))
,[New Value] = Substring(Pos3,CharIndex(':',Pos3)+1,Len(Pos3))
,[Function] = Substring(Pos5,CharIndex(':',Pos5)+1,Len(Pos5))
From #YourTable A
Cross Apply (
Select Pos1 = ltrim(rtrim(xDim.value('/x[1]','varchar(max)')))
,Pos2 = ltrim(rtrim(xDim.value('/x[2]','varchar(max)')))
,Pos3 = ltrim(rtrim(xDim.value('/x[3]','varchar(max)')))
,Pos4 = ltrim(rtrim(xDim.value('/x[4]','varchar(max)')))
,Pos5 = ltrim(rtrim(xDim.value('/x[5]','varchar(max)')))
,Pos6 = ltrim(rtrim(xDim.value('/x[6]','varchar(max)')))
,Pos7 = ltrim(rtrim(xDim.value('/x[7]','varchar(max)')))
,Pos8 = ltrim(rtrim(xDim.value('/x[8]','varchar(max)')))
,Pos9 = ltrim(rtrim(xDim.value('/x[9]','varchar(max)')))
From (Select Cast('<x>' + replace((Select A.Event as [*] For XML Path('')),',','</x><x>')+'</x>' as xml) as xDim) as A
) B
Returns
Area Old Value New Value Function
FB1 0 50 Blah1 func
FB2 99 5 Blah2 func
FB1 50 55 Blah1 func
Or 2 With A Function
Select A.Area
,[Old Value] = Substring(Pos2,CharIndex(':',Pos2)+1,Len(Pos2))
,[New Value] = Substring(Pos3,CharIndex(':',Pos3)+1,Len(Pos3))
,[Function] = Substring(Pos5,CharIndex(':',Pos5)+1,Len(Pos5))
From #YourTable A
Cross Apply [dbo].[udf-Str-Parse-Row](A.Event,',') B
The UDF if needed
ALTER FUNCTION [dbo].[udf-Str-Parse-Row] (#String varchar(max),#Delimiter varchar(10))
Returns Table
As
Return (
Select Pos1 = ltrim(rtrim(xDim.value('/x[1]','varchar(max)')))
,Pos2 = ltrim(rtrim(xDim.value('/x[2]','varchar(max)')))
,Pos3 = ltrim(rtrim(xDim.value('/x[3]','varchar(max)')))
,Pos4 = ltrim(rtrim(xDim.value('/x[4]','varchar(max)')))
,Pos5 = ltrim(rtrim(xDim.value('/x[5]','varchar(max)')))
,Pos6 = ltrim(rtrim(xDim.value('/x[6]','varchar(max)')))
,Pos7 = ltrim(rtrim(xDim.value('/x[7]','varchar(max)')))
,Pos8 = ltrim(rtrim(xDim.value('/x[8]','varchar(max)')))
,Pos9 = ltrim(rtrim(xDim.value('/x[9]','varchar(max)')))
From (Select Cast('<x>' + replace((Select #String as [*] For XML Path('')),#Delimiter,'</x><x>')+'</x>' as xml) as xDim) as A
)
--Select * from [dbo].[udf-Str-Parse-Row]('Dog,Cat,House,Car',',')
--Select * from [dbo].[udf-Str-Parse-Row]('John <test> Cappelletti',' ')
If it helps with the visualization, the CROSS APPLY (which can easily be a TVF) produces the following

Answer 2

here is the correct query I hope it helps .
declare #str varchar(1000)
declare #temp as table (id int , area varchar(10) , [event] varchar(100))
insert into #temp (id,area,[event]) values (1,'FB1','Dev_Chg, Old Value: 0, New Value: 50, Workstation: Blah1, Function: Blah1 func')
insert into #temp (id,area,[event]) values (1,'FB2','Dev_Chg, Old Value: 99, New Value: 5, Workstation: Blah2, Function: Blah2 func')
insert into #temp (id,area,[event]) values (1,'FB1','Dev_Chg, Old Value: 50, New Value: 55, Workstation: Blah1, Function: Blah1 func')
set #str ='Dev_Chg, Old Value: 0, New Value: 50, Workstation: Blah1, Function: Blah1 func'
select * from (
select area, RTRIM( LTRIM( SUBSTRING( String,0 , CHARINDEX (':',String ))) )as theader , SUBSTRING( String, CHARINDEX (':',String )+1,15) as tvalue from (
select * from
#temp cross apply
dbo.ufn_CSVToTable ([event])
) b
where b.String!='Dev_Chg'
)
as final
pivot ( max ( tvalue ) for theader in ([Old Value] , [New Value],[Workstation],[Function])
) as pvt
-- I used a tabled valued function to complete it the source is this
ALTER FUNCTION [dbo].[ufn_CSVToTable] ( #StringInput VARCHAR(8000) )
RETURNS #OutputTable TABLE ( [String] nVARCHAR(1000) )
AS
BEGIN
DECLARE #String nVARCHAR(1000)
WHILE LEN(#StringInput) > 0
BEGIN
SET #String = LEFT(#StringInput,
ISNULL(NULLIF(CHARINDEX(',', #StringInput) - 1, -1),
LEN(#StringInput)))
SET #StringInput = SUBSTRING(#StringInput,
ISNULL(NULLIF(CHARINDEX(',', #StringInput), 0),
LEN(#StringInput)) + 1, LEN(#StringInput))
INSERT INTO #OutputTable ( [String] )
VALUES ( #String )
END
RETURN
END