public DataSet GetRequestReferers(string url)
{
string sqlCommand = string.Format("SELECT [Referer], COUNT(*) as Requests FROM {0} where [OldUrl] = @oldurl GROUP BY [Referer] order by Requests desc", REDIRECTSTABLE);
var oldUrlParam = this.CreateParameter("oldurl", DbType.String, 4000);
oldUrlParam.Value = url;
var parameters = new List<IDbDataParameter>();
parameters.Add(oldUrlParam);
return ExecuteSQL(sqlCommand, parameters);
}