Question

我想在另一个表中使用带有select子查询的insert语句。就我而言，我想在PRESENTATION表到AVAILABILITY表中添加一行。

AVAILABILITY表格结构：

availableID        (number, generated using sequence)
availableDay       (varchar)
availableStart     (varchar)
availableEnd       (varchar)
lecturerID(FK)     (varchar)
presentationID(FK) (number, generated using sequence)

PRESENTATION表格结构：

presentationID         (number, generated using sequence)
presentationDay        (varchar)
presentationStart      (varchar)
presentationEnd        (varchar)

我尝试在DAO中构建查询，如下所示：

        String lecturerID = Abean.getLecturerID();
        String availableDay = Abean.getAvailableDay();
        String availableStart = Abean.getAvailableStart();
        String availableEnd = Abean.getAvailableEnd();
        Date availableDate = Abean.getAvailableDate();
        String presentationID = Abean.getPresentationID();

    try{  

            currentCon = JavaConnectionDB.getConnection();

            PreparedStatement ps=currentCon.prepareStatement("
            insert into availability (availableID,
                                      lecturerID,
                                      availableDay,
                                      availableStart,
                                      availableEnd,
                                      presentationid) 
           select(availabilityseq.nextval,
                  ?,
                  presentationDay,
                  presentationStart,
                  presentationEnd,
                  presentationid) 
                  from presentation where presentationid=?

            ");  
            ps.setString(1,Abean.getLecturerID());  
            ps.setString(2,Abean.getAvailableDay());  
            ps.setString(3,Abean.getAvailableStart()); 
            ps.setString(4,Abean.getAvailableEnd());  
            ps.setString(5,Abean.getPresentationID()); 
           // ps.setString(6,Abean.getAvailableID());
            ps.executeUpdate();  

            }
    catch(Exception e){
      System.out.println("add availability 2 failed: An Exception has occurred! " + e);
    }

正如所料，它返回错误

错误：java.sql.SQLException: Invalid column index

那么，如何使用额外的列插入子查询？

更新：MY DAO代码

Answer 1

您需要将绑定变量值的设置与SQL文本中的绑定变量规范相匹配：

编辑4月18日：从select子查询中删除了括号

PreparedStatement ps=currentCon.prepareStatement("
            insert into availability (availableID,
                                      lecturerID,
                                      availableDay,
                                      availableStart,
                                      availableEnd,
                                      presentationid) 
           select availabilityseq.nextval,
                  ?,
                  presentationDay,
                  presentationStart,
                  presentationEnd,
                  presentationid
                  from presentation where presentationid=?
            ");  
            ps.setString(1,Abean.getLecturerID());  // match first "?"
            ps.setString(2,Abean.getPresentationID());    // match 2nd "?"

插入带有子查询和额外列的语句

1 个答案: