many rows into a single column with SQL - sql

Question

I have an one to many table, and if there is rows that have same reference id(Paragraph ID) I want to concatenate so LoginName value have many in same row.
This query does what I want it to do but there is a problem, It replaces first char. the STUFF function requires a replace value.
My question:
How can I do this without replacing first char?
SELECT DISTINCT
ParagraphID
, STUFF((
SELECT N'|' + CAST([LoginName] AS VARCHAR(255))
FROM [dbo].[CM_Signature] f2
WHERE f1.ParagraphID = f2.ParagraphID
FOR XML PATH ('')), 1, 2, '') AS FileNameString
FROM [dbo].[CM_Signature] f1
Expected value:
Daniel | Emma

Answer 1

Here is what you can use:
SELECT DISTINCT
ParagraphID
, STUFF((
SELECT N' | ' + CAST([LoginName] AS VARCHAR(255))
FROM [dbo].[CM_Signature] f2
WHERE f1.ParagraphID = f2.ParagraphID
FOR XML PATH ('')), 1, 1, '') AS FileNameString
FROM [dbo].[CM_Signature] f1
Note the STUFF("...", 1, 1, '') instead of STUFF("...", 1, 2, '').
Because you need to replace 1 char instead of 2 (To remove the first |).
Output:
Daniel|Emma
Also, if you want to have spaces before and after the |, just use this query:
SELECT DISTINCT
ParagraphID
, STUFF((
SELECT N' | ' + CAST([LoginName] AS VARCHAR(255))
FROM [dbo].[CM_Signature] f2
WHERE f1.ParagraphID = f2.ParagraphID
FOR XML PATH ('')), 1, 3, '') AS FileNameString
FROM [dbo].[CM_Signature] f1
Note that this time we removed 3 chars (STUFF("...", 1, 3, '')).
Output:
Daniel | Emma

Answer 2

You were starting your path at position 2 instead of first
SELECT DISTINCT
ParagraphID
, STUFF((
SELECT N'|' + CAST([LoginName] AS VARCHAR(255))
FROM [dbo].[CM_Signature] f2
WHERE f1.ParagraphID = f2.ParagraphID
FOR XML PATH ('')), 1, 1, '') AS FileNameString
FROM [dbo].[CM_Signature] f1 SELECT DISTINCT
ParagraphID
, STUFF((
SELECT N'|' + CAST([name] AS VARCHAR(255))
FROM mytable f2
WHERE f1.paragraphid = f2.paragraphid
FOR XML PATH ('')), 1, 1, '') AS FileNameString
FROM mytable f1

Answer 3

Use this Code:
create table #test (paragraghid int,name VARCHAR(10))
insert into #test values(1929,'Daniel')
insert into #test values(1929,'Emma')
insert into #test values(1935,'Daniel')
select distinct paragraghid,STUFF((select ' | ' + name from #test a
Where a.paragraghid=b.paragraghid for XML PATH('') ),1,2,'') as FilenameString
from #test b

Answer 4

You can write a query as:
DECLARE #CM_Signature table
(
RowId int,
ParagraphID int,
LoginName varchar(10))
Insert into #CM_Signature values
(4,1929,' Daniel'),
(5,1929,' Emma '),
(6,1935,'Daniel')
SELECT DISTINCT
ParagraphID
, STUFF((
SELECT N'| ' + CAST(rtrim(ltrim([LoginName])) AS VARCHAR(255))
FROM #CM_Signature f2
WHERE f1.ParagraphID = f2.ParagraphID
FOR XML PATH ('')), 1, 1, '') AS FileNameString
FROM #CM_Signature f1