QT访问数据库的源码，可以查询添加删除表记录-QT source code to access the database, you can add delete table records query

实现一个界面类似于QQ的通讯录程序，可以根据不同的登录用户显示每个用户的联系人信息，联系人可以动态添加删除修改，可以对联系人进行分组显示，需要连接数据库。-QQ implement an interface similar to the address book program, you can log the user according to different contact information for each user, the contact can dynamically ad

QT 采用的是sqlite数据库，可以实现添加，编辑，删除，按各种条件删选的功能-QT USES a sqlite database, can be achieved to add, edit, delete, delete selected function according to various conditions

使用QT+SQlite3实现的数据库管理系统，能够实现对数据的添加、删除、显示等操作。-QT+SQlite3 implemented using a management system, enabling the data to add, delete, display and other operations.

QT 实现combobox,spinbobox的委托代理功能(QT database to achieve a simple add, delete function)