Hello guys and welcome to Code2Night. In the article, we will see how to convert Multiple Rows to a Comma-Separated Value in SQL Server

In SQL Server, there are times when we encounter scenarios where we need to combine multiple rows into a single comma-separated value. This can be useful when we want to retrieve data from a table in a format that is easier to process or display. Thankfully, SQL Server provides us with several techniques to achieve this.

DECLARE @Table1 TABLE(ID INT, Value INT)
INSERT INTO @Table1 VALUES (1,100),(1,200),(2,300),(2,400)


SELECT  ID
       ,STUFF((SELECT ', ' + CAST(Value AS VARCHAR(10)) [text()]
         FROM @Table1 
         WHERE ID = t.ID
         FOR XML PATH(''), TYPE)
        .value('.','NVARCHAR(MAX)'),1,2,' ') List_Output
FROM @Table1 t
GROUP BY ID

Here is the output for Multiple rows to one comma-separated value in SQL Server