comma separated values in sql server code example

Example 1: sql server: select column values as comma separated string

DECLARE @SQL AS VARCHAR(8000)
SELECT @SQL = ISNULL(@SQL+',','') + ColumnName FROM TableName
SELECT @SQL

Example 2: coalesce for comma separated in sql server

DECLARE @List VARCHAR(8000)

SELECT @List = COALESCE(@List + ',', '') + CAST(OfferID AS VARCHAR)
FROM   Emp
WHERE  EmpID = 23

SELECT @List

Example 3: get value comma separated sql server

DECLARE @UserMaster TABLE( 

    UserID INT NOT NULL, 

    UserName varchar(30) NOT NULL 

); 

INSERT INTO @UserMaster VALUES (1,'Rakesh')

INSERT INTO @UserMaster VALUES (2,'Ashish')

INSERT INTO @UserMaster VALUES (3,'Sagar')

SELECT * FROM @UserMaster

DECLARE @CSV VARCHAR(MAX) 

SELECT @CSV = COALESCE(@CSV + ', ', '') + UserName from @UserMaster 

SELECT @CSV AS Result