Database System ConceptsThis popular text in database systems is used in departments of computer science, computer engineering, and electrical engineering. The revision includes more material on SQL, relational models, logical databases, "QB" and "Datalog." |
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Page 6
... Data Models Underlying the structure of a database is the concept of a data model , a collection of conceptual tools for describing data , data relationships , data semantics , and consistency constraints . The various data models that ...
... Data Models Underlying the structure of a database is the concept of a data model , a collection of conceptual tools for describing data , data relationships , data semantics , and consistency constraints . The various data models that ...
Page 21
... data models can be found in Tsichritzis and Lochovsky [ 1982 ] . More extensive bibliographic references are provided in later chapters of this book . The binary data model was proposed by Abrial [ 1974 ] . Additional discussions are ...
... data models can be found in Tsichritzis and Lochovsky [ 1982 ] . More extensive bibliographic references are provided in later chapters of this book . The binary data model was proposed by Abrial [ 1974 ] . Additional discussions are ...
Page 53
Henry F. Korth, Abraham Silberschatz. 3 Relational Model From a historical perspective , the relational data model is relatively new . The first database systems were based on either the network model ( see Appendix A ) or the hierarchical ...
Henry F. Korth, Abraham Silberschatz. 3 Relational Model From a historical perspective , the relational data model is relatively new . The first database systems were based on either the network model ( see Appendix A ) or the hierarchical ...
Contents
Introduction | 1 |
EntityRelationship Model | 23 |
Relational Model | 53 |
Copyright | |
40 other sections not shown
Common terms and phrases
abort account-number algorithm allows attributes B-tree bank BCNF block borrow branch-city branch-name bucket buffer candidate key cascading rollback Chapter commit compute concurrency control conflict serializable consider constraints contains coordinator corresponding CustAcct customer-city customer-name data item data model database system DBTG deadlock decomposition defined delete discussed disk domain domain relational calculus Downtown E-R diagram employees ensure entity set example execution expression functional dependencies hash function implementation insert Johnson join loan loan-number log records main memory manager Mianus multivalued dependencies node object-oriented Perryridge branch pointer primary key query language r₁ R₂ read(A record type recovery relation scheme relational algebra relational database relationship set require result rule schedule search-key value Section serializability set occurrence shown in Figure stable storage Stonebraker stored strategy structure superkey T₁ T₂ techniques timestamp transaction tree-structure diagram tuple relational calculus update wait-for graph weak entity write write(Q