Relational database writings, 1985-1989, Volume 1
Collected papers--many of them previously unpublished, on various aspects of relational technology--include such topics as the problems of duplicates, foreign keys, database integrity, distributed database systems, and tips on SQL.
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Why Relational? Abstract
Simple Data Structure
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Addison-Wesley alternate key apply argument base table C. J. Date candidate key CASCADES CHECK FORALL clause CODASYL column component composite concept course CREATE INTEGRITY RULE data type database design Database Systems DBMS default defined definition delete rule DEPT discussion distributed database domain duplicate rows E. F. Codd employee entity entity integrity evaluates example EXISTS expression fact fansets foregoing foreign key values formulation function given implementation INGRES INSERT integrity constraints interval language least means Note operations paper partly null possible primary key problem quantifier query range variable reference referential constraint referential integrity relational algebra Relational Database relational model relational systems RESTRICTED result scalar schema Section SELECT DISTINCT Selected Writings Reading shipment SNAME SP.P SP.S specified SPX.S SQL standard SQL/DS supplier number SX.S syntax table SP table Tl three-valued logic tion update rule