Concat field value to string in SQL Server

Question

I need a similar function to Oracle WM_CONCAT in SQL Server, which returns a comma separated list of whatever field you pass it as argument. For example, in Ora

Answer 1

 SELECT Field1, Substring(Field2, 2, LEN(Field2)) AS Field2 FROM
(
    SELECT
        [InnerData].Field1,
        (SELECT  ',' + Field2 FROM @Fields WHERE Field1=[InnerData].Field1 FOR XML PATH('')) AS Field2
        FROM
        (
            SELECT DISTINCT Field1 FROM @Fields
        ) AS [InnerData]
) AS OuterData

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