Query to get XML output for hierarchical data using FOR XML PATH in SQL Server

Question

I have a table with columns NodeId, NodeName, ParentNodeId and I want to ouput entire table data in the form of Xml like the following using SQL query. I think FOR XML PATH mode

Answer 1

I solved it using a stored procedure and a recursive function. code shown below. (actually I wanted this to generate a menu xml, so the code is shown for the menu.

    CREATE PROCEDURE [dbo].[usp_GetMenu]
    AS
    BEGIN
        SET NOCOUNT ON;

        SELECT  dbo.fnGetMenuItems(MenuId)
        FROM    dbo.Menu
        WHERE   ParentMenuId IS NULL
        FOR XML PATH('MenuItems')
    END
    GO

CREATE FUNCTION [dbo].[fnGetMenuItems]
(
    @MenuId int
)
RETURNS XML
WITH RETURNS NULL ON NULL INPUT
AS
BEGIN

    RETURN 
    (
        SELECT  MenuId AS "@Id"
                , [Name] AS "@Name"
                , [URL] AS "@URL"
                , [Key] AS "@Key"
                , [dbo].[fnGetMenuItems](MenuId)
        FROM    dbo.Menu
        WHERE   ParentMenuId = @MenuId
        FOR XML PATH('MenuItem'),TYPE
    )

END
GO