SELECT
    id
    , firstName
    , lastName
    , email
    , phone
    , postalCode
FROM address
ORDER BY
    firstName, lastName 
FOR XML AUTO, ROOT('addresses')

using System;
using System.Data;
using System.Data.SqlTypes;
using System.Data.SqlClient;
using Microsoft.SqlServer.Server;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Xml;
using System.Xml.XPath;
 
/**
 * The JSONTransformer class provides methods to encode XML datasets
 * into JSON. These methods are intended to be used by a 
 * Microsoft SQL Server 2005 or higher.
 * @author Adam Presley
 */
public partial class JSONTransformer
{
    /**
     * This method takes an XML dataset and serializes it to a 
     * JSON string acceptable for AJAX/client use.
     * 
     * <code>
     * DECLARE @resultSetXML VARCHAR(max);
     * DECLARE @rootNodeName VARCHAR(75);
     * DECLARE @elementNodeName VARCHAR(75);
     * DECLARE @result VARCHAR(max);
     * 
     * SET @rootNodeName = 'addresses';
     * SET @elementNodeName = 'address';
     * 
     * SET @resultSetXML = (
     *     SELECT
     *         id
     *         , firstName
     *         , lastName
     *         , email
     *         , phone
     *         , postalCode
     * FROM address
     *     ORDER BY
     *         firstName, lastName 
     * FOR XML AUTO, ROOT('addresses'));
     *     
     * SELECT dbo.SQLJsonEncode(@resultSetXML, @rootNodeName, @elementNodeName) AS jsonResult;
     * </code>
     * 
     * @author Adam Presley
     * @param resultSetXML - The SQL result set serialized to XML
     * @param rootNodeName - The name of the XML root node
     * @param elementNodeName - The name of a record's XML node
     * @returns A string containing the resultset as JSON.
     */
    [SqlFunction()]
    public static string Encode(string resultSetXML, string rootNodeName, string elementNodeName)
    {
        XmlDocument xmlDoc = new XmlDocument();
        DataSet dataset = new DataSet();
        StringBuilder result = new StringBuilder();
        int recordCount = 0;
        int currentIndex = 0;
 
        /*
         * Create an XPath iterator.
         */
        XmlTextReader reader = new XmlTextReader(new StringReader(resultSetXML));
        XPathDocument xdoc = new XPathDocument(reader);
        XPathNavigator nav = xdoc.CreateNavigator();
        XPathNodeIterator iter = nav.Select(rootNodeName + "/" + elementNodeName);
 
        recordCount = iter.Count;
        currentIndex = 0;
 
        result.Append("{ \"recordcount\": \"" + recordCount.ToString() + "\", \"data\": [ ");
 
        while (iter.MoveNext())
        {
            XPathNavigator item = iter.Current;
            result.Append("{ ");
 
            /*
             * If we have attributes iterate over them and add them to
             * the JSON object.
             */
            if (item.HasAttributes)
            {
                item.MoveToFirstAttribute();
                string line = "";
 
                do
                {
                    string name = item.Name;
                    string value = item.Value;
 
                    line += "\"" + name + "\": \"" + __jsonEscape(value) + "\", ";
                } while (item.MoveToNextAttribute());
 
                /*
                 * Remove trailing comma
                 */
                line = line.Substring(0, line.Length - 2);
                result.Append(line);
            }
 
            result.Append(" }");
            if (currentIndex < recordCount - 1) result.Append(", ");
            currentIndex++;
        }
 
        result.Append(" ]}");
 
        reader.Close();
        return result.ToString();
    }
 
    /**
     * This method escapes a string in a format suitable
     * for JSON and JavaScript.
     * @author Adam Presley
     * @param data - The piece of data to JavaScript encode
     * @returns A string properly encoded for JavaScript
     */
    private static string __jsonEscape(string data)
    {
        string result = data;
 
        result = result.Replace("\"", "\\\"");
 
        return result;
    }
}

DECLARE @resultSetXML VARCHAR(max);
DECLARE @rootNodeName VARCHAR(75);
DECLARE @elementNodeName VARCHAR(75);
DECLARE @result VARCHAR(max);
 
SET @rootNodeName = 'addresses';
SET @elementNodeName = 'address';
 
SET @resultSetXML = (
	SELECT
		id
		, firstName
		, lastName
		, email
		, phone
		, postalCode
	FROM address
	ORDER BY
		firstName, lastName 
	FOR XML AUTO, ROOT('addresses'));
 
SELECT dbo.SQLJsonEncode(@resultSetXML, @rootNodeName, @elementNodeName) AS jsonResult;