000			01353nam a22001817a 4500
008			121102t xxu||||| |||| 00| 0 eng d
020			_a0201144565
050			_aQA76.9.D3.D37
100			_aDate, C.J.
245			_aAn Introduction to database. / _cC.J. Date
250			_a2nd ed.
260			_aLondon: _bAddison-Wesley Publication, _cc1977.
300			_axxiii, 536 p.: _bill.; _c24cm.
500			_aIncludes index.
505			_aContents: 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.
650			_bDatabase systems.
942			_2lcc _cBK
999			_c2499 _d9999