database - 如何在 lopp 中添加另一个 sql 选择查询？因为我想将来自不同表的其他数据添加到来自同一个数据库的同一个对象

Question

        PreparedStatement psmt = con.prepareStatement("Select * From EVENTS WHERE E_STATUS='PendingApproval' OR E_STATUS='Modify'OR E_STATUS='CancelRequest'");
        ResultSet rs = psmt.executeQuery();

        EventShow row = null;
        /* here assume i have multiple rows in the result set */
        while (rs.next()) {

//我想在这里添加另一个选择查询。因为我想将不同//表中的其他数据添加到同一个对象。

            row = new EventShow();
            row.setEventid(rs.getInt("E_ID"));
            //row.setEventdate(rs.getString("E_Date"));
            row.setEventName(rs.getString("E_NAME"));
            row.setStatus(rs.getString("E_STATUS"));
            //row.setLastmodify(rs.getDate("TO_CHAR(E_AUTH_TIME,'YYYY/MM/DD:HH:MM')"));
            //row.setLastmodify(nvl(rs.getDate("TO_CHAR(E_AUTH_TIME,'YYYY/MM/DD:HH:MM')")),'00/00/0000');
           // row.setLastmodify(TO_CHAR(nvl(rs.getDate("E_AUTH_TIME"),'00/00/0000')),'YYYY/MM/DD:HH:MM');
            //row.setLastmodify(rs.getString"(nvl(TO_CHAR(MDATE_FROM,'YYYYMMDD'),'')");


            event_show.add(row);
        }

Answer 1

这是有关如何执行此操作的伪代码：

    PreparedStatement psmt = con.prepareStatement("Select * From EVENTS WHERE E_STATUS='PendingApproval' OR E_STATUS='Modify'OR E_STATUS='CancelRequest'");
    ResultSet rs = psmt.executeQuery();

    EventShow row = null;
    while (rs.next()) {
        row = new EventShow();
        row.setEventid(rs.getInt("E_ID"));
        //row.setEventdate(rs.getString("E_Date"));
        row.setEventName(rs.getString("E_NAME"));
        row.setStatus(rs.getString("E_STATUS"));
        /////////////////////////////////////////////
        PreparedStatement psmt2 = con.prepareStatement("Select Query");
        ResultSet rs2 = psmt.executeQuery(); 
        // Now work on the rs2 inside another while loop
        /////////////////////////////////////////////
        //row.setLastmodify(rs.getDate("TO_CHAR(E_AUTH_TIME,'YYYY/MM/DD:HH:MM')"));
        //row.setLastmodify(nvl(rs.getDate("TO_CHAR(E_AUTH_TIME,'YYYY/MM/DD:HH:MM')")),'00/00/0000');
       // row.setLastmodify(TO_CHAR(nvl(rs.getDate("E_AUTH_TIME"),'00/00/0000')),'YYYY/MM/DD:HH:MM');
        //row.setLastmodify(rs.getString"(nvl(TO_CHAR(MDATE_FROM,'YYYYMMDD'),'')");


        event_show.add(row);
    }