"The emergence of the information system database system turn around a shared database as the center of a new stage of processing of data from application-centered"

　　This is the book's words, read some jerky, we need to understand carefully.

• "In the data processing program centric"

　　In the database system has not been designed, when an application wants to store the data, responsible for the design data storage structure, you need to save data to its own memory space, the application if you want to read the data, you need to look for from their own storage space and read the data, then the application should own the data resolution.

　　Recall that would own freshman, wrote a "Sokoban" not learned database, how I save the game records and read it?

　　Save: New / open a file, save the data to a file, close the file.

　　Read: Open the file data storage, data is read.

• "Centered around a shared database"

　　Ever since the database systems, data centralized database maintained by the system, applications can focus more on core business logic implementation.

　　

　　If you have many many many books, if you need to manage it to write a book, you may need to consider how to store more convenient to find the book, how to store these books more space, if you have a special someone to help you manage these books, there is no need to consider these questions to you, you will have more energy to do more important things.