TY  - BOOK
AU  - Date, C.J.
TI  - An Introduction  to database.
SN  - 0201144565
AV  - QA76.9.D3.D37 
PY  - 1977///
CY  - London
PB  - Addison-Wesley Publication
KW  - Database systems
N1  - 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
ER  -