Variables HSQL |从数据库中删除

我目前正在处理一个只有3个表的小数据库，它显示在

javafx.TableView<Event>

，因此，我希望执行类似于以下内容的删除表达式：

DELETE FROM events WHERE name = (name) AND location = (location) AND numberofguests = (numberOfGuests) AND date = (date) VALUES (?, ?, ?, ?)

当然，我需要将其打包到一份准备好的声明中：

    private static PreparedStatement getPrepStateFromEvent (Event e) throws SQLException {
    //--get the attributes of the event--//
    String eventName = e.getName();
    String location = e.getLocation();
    int numOfGuests = e.getNumberOfGuests();
    Date d = e.getDate();

    //--form a prepared statement--//
    PreparedStatement pstmnt = conn.prepareStatement(INSERT_INTO_EVENTS);

    //--enter values for the spaceholders in the pstmnt--//
    pstmnt.setString(1, eventName);
    pstmnt.setString(2, location);
    pstmnt.setInt(3, numOfGuests);
    pstmnt.setDate(4, d);

    //--return--//
    return pstmnt;
}

---

这在插入时效果很好，但在删除时效果不好。您能帮助我吗？

您的删除语法错误：

DELETE FROM events 
WHERE name = ?  
  AND location = ? 
  AND numberofguests = ? 
  AND date = ? 

没有

VALUES

子句，您在哪里看到这种奇怪的语法

为便于将来参考，手册中记录了完整的语法：

DELETE FROM events 
WHERE name = ?  
  AND location = ? 
  AND numberofguests = ? 
  AND date = ?