show one column in multiple rows - sql

Question

I’ve been looking for a way to show one column in multiple rows, one cell. The content of it separated by comma’s.
For example, in stead of:
ProjectID Label
———— ——–
1200 label1
1200 label2
1200 label3
I would like the result of my query to look like this:
ProjectID Label
———— ——–
1200 label1, label2, label3
thanks in advance

Answer 1

There are different ways to do this. One option is to create a table valued function that 'splits' your multiple valued cell on different records. Here is an example of an split function:
ALTER FUNCTION [dbo].[Split](#RowData VARCHAR(MAX), #SplitOn VARCHAR(5))
RETURNS #RtnValue TABLE
(
Id int identity(1,1),
Data VARCHAR(MAX)
)
AS
BEGIN
Declare #Cnt int
Set #Cnt = 1
While (Charindex(#SplitOn,#RowData)>0)
Begin
Insert Into #RtnValue (data)
Select
Data = ltrim(rtrim(Substring(#RowData,1,Charindex(#SplitOn,#RowData)-1)))
Set #RowData = Substring(#RowData,Charindex(#SplitOn,#RowData)+1,len(#RowData))
Set #Cnt = #Cnt + 1
End
Insert Into #RtnValue (data)
Select Data = ltrim(rtrim(#RowData))
Return
END
Once created, you can do the following to obtain your results:
SELECT *
FROM YourTable A
CROSS APPLY dbo.Split(Label,', ') B

Answer 2

Here, I have made Table Valued Function which splits the string and return the result as your desired
--Create the function
CREATE FUNCTION dbo.Split(#ProjectId nvarchar(50),#String varchar(8000), #Delimiter char(1)) --Pass projectID,label and delimiter and returns table
returns #temptable TABLE (id nvarchar(50),items varchar(8000))
as
begin
declare #idx int
declare #slice varchar(8000)
select #idx = 1
if len(#String)<1 or #String is null return
while #idx!= 0
begin
set #idx = charindex(#Delimiter,#String)
if #idx!=0
set #slice = left(#String,#idx - 1)
else
set #slice = #String
if(len(#slice)>0)
insert into #temptable(id,Items) values(#ProjectId,#slice)
set #String = right(#String,len(#String) - #idx)
if len(#String) = 0 break
end
return
end
--Calling the function
select * from dbo.split('1200',' label1, label2, label3',',') --calling teh function

Answer 3

create table #comma_seprate
(ProductID int,
Lable varchar(max))
declare #index int, #id int;
declare #lable varchar(max);
declare cur_comma cursor
for select ProductID, Lable from comma_seprate
open cur_comma
fetch next from cur_comma into #id, #lable
while (##fetch_status=0)
begin
set #index=charindex(',',#lable);
while(#index>0)
begin
insert into #comma_seprate values (#id,rtrim(ltrim(left(#lable,#index-1))));
set #lable=substring(#lable,#index+1,len(#lable));
set #index=charindex(',',#lable);
end
insert into #comma_seprate values (#id, rtrim(ltrim(#lable)));
fetch next from cur_comma into #id,#lable;
end
close cur_comma;
deallocate cur_comma;
select * from #comma_seprate;
truncate table #comma_seprate;

Answer 4

Use SQL Server table function with split function which returns a table