var steps = _db.tblConversions.GroupBy(c => c.CvStep).OrderBy(c=>c.Key).Select(s => s.Key).ToList();
                foreach (var step in steps)
                {
                    var keywords =
                        _db.ExecuteQuery<string>(
                            "SELECT DISTINCT SkwKeyword FROM tblSearchKeywords WHERE  SkwIpAddress in (" +
                            " SELECT DISTINCT CvIP FROM tblConversions " +
                            " WHERE SkwIpAddress     IN (SELECT DISTINCT CvIP FROM tblConversions WHERE CvStep = {0}) " +
                            "  AND  SkwIpAddress NOT IN (SELECT DISTINCT CvIP FROM tblConversions WHERE CvStep > {0}))",
                            step);

                    sb.AppendFormat("<tr><td>Stap&nbsp;{0}</td><td style=\"text-align:left;\">{1}</td></tr>", step,
                        String.Join(" | ",keywords));
                }