@Prog! - ASP.NET(C#) AJAX -

using System;
using System.Linq;
using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[ args)
        {
            using (DataClasses1DataContext dataContext = new DataClasses1DataContext())
            {
                StreamWriter sw = new StreamWriter(@"d:\log.txt");
                sw.AutoFlush = true;
                TextWriter tw = TextWriter.Synchronized(sw);

                dataContext.Log = tw;

                var rs = (
                            from t1 in dataContext.Table_1 select t1
                        ).Union(
                            from t2 in dataContext.Table_1 select t2
                        ).OrderBy(t => t.ID);

                foreach (var r in rs)
                    Console.WriteLine("{0}:{1}", r.ID, r.Number);
            }

            Console.ReadLine();
        }
    }
}

SELECT [t3].[ID], [t3].[Number]
FROM (
    SELECT [t2].[ID], [t2].[Number]
    FROM (
        SELECT [t0].[ID], [t0].[Number]
        FROM [dbo].[Table_1] AS [t0]
        UNION
        SELECT [t1].[ID], [t1].[Number]
        FROM [dbo].[Table_1] AS [t1]
        ) AS [t2]
    ) AS [t3]
ORDER BY [t3].[ID]
-- Context: SqlProvider(Sql2005) Model: AttributedMetaModel Build: 3.5.21022.8