Database Processing: Fundamentals, Design, ImplementationInformation Systems -- Database Management. |
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Page 174
... shown in Figure 6-8 , each object is represented by a relation . The key of AUTO is Serial # and the key of EMPLOYEE is Employee # . To make the connection between an employee and an automobile , we either place the Serial # in the ...
... shown in Figure 6-8 , each object is represented by a relation . The key of AUTO is Serial # and the key of EMPLOYEE is Employee # . To make the connection between an employee and an automobile , we either place the Serial # in the ...
Page 579
... shown in Figure 15-4b . In this case , node W is a mainframe , nodes X and Y are minicomputers , and node Z is a microcomputer . The processing rules are that only node W can modify the database . Nodes X and Y , which have copies of ...
... shown in Figure 15-4b . In this case , node W is a mainframe , nodes X and Y are minicomputers , and node Z is a microcomputer . The processing rules are that only node W can modify the database . Nodes X and Y , which have copies of ...
Page 652
... Figure B - 23 ) . We have effectively cut one link out of the chain and welded together the ones it once connected . Inverted List Representation of Trees . A tree structure can be readily represented using inverted lists . The ...
... Figure B - 23 ) . We have effectively cut one link out of the chain and welded together the ones it once connected . Inverted List Representation of Trees . A tree structure can be readily represented using inverted lists . The ...
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1:N relationships Activity advisor Application Development application programs APPOINTMENT attributes binary relationships cation changes Chapter Class COBOL components constraints contains CUSTOMER data dictionary data items database administration database application database design database processing database system dataflow diagram DBMS engine DBMS products define delete DEPARTMENT object display DK/NF documentation domain definitions domain/key normal form EMPLOYEE entity example faculty file processing systems foreign key format fourth normal form functional dependency identify implementation interface invoice logical Major many-to-many menus meta-data microcomputer modification anomalies modify multi-user multivalued dependencies object diagrams object instance object property operations overhead data personnel phase problem query relational model represent requirements SALESPERSON Samantha schedule screen second normal form shown in Figure Sname stored structure STUDENT data STUDENT object student records Student-ID subschema system development third normal form tion transaction processing programs tuple update user's