Generally speaking, the initial test does not involve the contents of the database. Unified examination is to test the principle of computer composition, computer network, data structure and operating system.

Database Principles is a book published by Tsinghua University Publishing House in 2008. "Database Principles" is a rare database collection for database beginners and junior developers, which incorporates the author's in-depth and thorough understanding of databases and rich practical experience. Like the second edition, this edition also describes the database principle and its application in a simple way. This book introduces the basic concepts of a successful database management system, including the basic principles of relational model, structured query language, data modeling, database design, database management and Web database processing. But the technical update is more practical, and the new contents include subtype/subtype entity, FootE-R diagram of IECrow, database processing based on Wed, business intelligence system, SQL view, SQLServer2005ExpressEdition and MySQL5.0.