数据库系统基础教程第七章练习题答案总结

reate Table Movies (title CHAR(100), year INT, length INT, genre CHAR(10), studioName CHAR(30), producerC" In the seventh chapter of the Database Systems Fundamentals textbook, the concept of creating database tables is discussed in depth. The chapter provides examples and explanations of how to use SQL commands to create tables and define their structure. The chapter begins by introducing the CREATE TABLE statement, which is used to create a new table in a database. It explains the syntax of the statement and the different data types that can be used to define the columns of a table, such as CHAR, INT, and VARCHAR. The chapter also covers the use of constraints, such as PRIMARY KEY, FOREIGN KEY, UNIQUE, and NOT NULL, to enforce data integrity and define relationships between tables. One of the examples provided in the chapter is the creation of a table called Movies. The table has columns for the movie title, year of release, length in minutes, genre, studio name, and producer. Each column is defined with an appropriate data type, such as CHAR for the title and studio name, INT for the year and length, and VARCHAR for the genre. The example also demonstrates how to define a PRIMARY KEY constraint on the title column to ensure that each movie title is unique. Overall, the seventh chapter of the Database Systems Fundamentals textbook provides a comprehensive overview of how to create database tables using SQL commands. It covers the syntax of the CREATE TABLE statement, the use of data types and constraints, and provides examples to illustrate the concepts discussed. By following the guidelines and examples presented in the chapter, readers can learn how to effectively create and define tables in a database to store and manage information.