【1】CMU数据库导论公开课随记

How to make sure that all the data are safe,valid and liable?

-DBMS(DataBase Management System)

df. A DBMS is a software that allows applications to store and analyze information in a database.

Problems of early DBMS

-difficult to build and maintain

-tight coupling between logical and physical layers

-hava to know what queries the app would execute before deploying the database

Relational model

-DBMS gets to decide the best way to store the data.