As we will show, for a database, the operations include create, update, and delete.
下面我们将介绍，对数据库的操作包括创建、更新和删除。
Delete the loaded data so that the initial database is empty.
删除已加载的数据，以便初始数据库为空。
Delete data in your database example.
删除数据库示例中的值。
Fully keep check detail in database, never to delete.
所有帐单的详情都保存在数据库，决不删除。
Fully keep check detail in database, never to delete.
所有帐单的详情都保存在数据库，决不删除。
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