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截图来自数据库系统概念中文第六版 想要中文版和英文版的请留言！！！我会尽量及时回复！！！ 数据库系统体系结构 实践习题和答案 1.2 1.3 1.6 习题 1.13 Answer: A general purpose database-management system (DBMS) has five responsibilities: a. int...

1.create table department (dept name varchar (20), building varchar (15), budget numeric (12,2), primary key (dept name)); create table r (A1 D1, A2 D2, . . . , An Dn, integrity-constraint1, . . . ...