01353nam a22001817a 4500 121102t xxu||||| |||| 00| 0 eng d 0201144565 QA76.9.D3.D37 Date, C.J. An Introduction to database. / C.J. Date 2nd ed. London: Addison-Wesley Publication, c1977. xxiii, 536 p.: ill.; 24cm. Includes index. Contents: Database system architecture: Basic concepts -- Storage structures -- Data models and data sublanguages -- The Relational approach: The Relational data model -- A Data sublanguage based on relational calculus -- A Data sublanguage based on relational algebra -- The Data sublanguage sequel -- Query by example -- Further normalization -- The External model -- Some relational systems -- The Hierarchical approach: The Architecture of an IMS system -- The IMS data model -- The IMS external model -- The IMS data sublanguage -- IMS storage structures -- IMS logical databases -- IMS secondary indexing -- The Network approach: The Architecture of a DBTG system -- The DBTG data model -- The DBTG external model -- The DBTG data sublanguage -- Security and integrity: Security -- Integrity -- Review, analysis, and comparisons: The Three approaches revisited. Database systems. lcc BK 2499 9999 0 0 lcc 0 0 WIUC-1 WIUC-1 REF 2012-11-02 0 QA76.9.D3.D37 6440/12 2012-11-02 00:00:00 2012-11-02 BK