为什么这段sql代码不正确执行，大家给看看

Question

StringBuffer buffer = new StringBuffer();
        buffer.append("INSERT INTO pfb.dbo.");
        if (!map.get("keyword").toString().equals("") && (map.get("pathname").toString().equals(""))) {
            buffer.append("Keyword");
        }
        if (!map.get("pathname").toString().equals("") && (map.get("keyword").toString().equals(""))) {
            buffer.append("Imgpath");
        }
        if (!map.get("keyword").toString().equals("") && !map.get("pathname").toString().equals("")) {
            buffer.append("INSERT INTO pfb.dbo.Keyword VALUES('"
                    + map.get("keyword") + "','" + map.get("picturename")
                    + "','" + map.get("turnurl") + "','" + map.get("justone")
                    + "');INSERT INTO pfb.dbo.Imgpath VALUES('"
                    + map.get("pathname") + "','" + map.get("picturename")
                    + "','" + map.get("turnurl") + "','" + map.get("justone")
                    + "');");
        }
        if (buffer.indexOf("VALUES") < 0) {
            buffer.append(" VALUES('"
                    + ((!map.get("keyword").equals("")) ? map.get("keyword")
                            : map.get("pathname")) + "','"
                    + map.get("picturename") + "','" + map.get("turnurl")
                    + "','" + map.get("justone") + "')");
        }