User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 1
... become commonplace in library and information services during the last fifteen years . Their use in the seeking and transfer of scientific and technical information is daily routine in the field . During the next few years , BDBs will ...
... become commonplace in library and information services during the last fifteen years . Their use in the seeking and transfer of scientific and technical information is daily routine in the field . During the next few years , BDBs will ...
Page 16
... become ( PRODUCT - NO , 15 , int , 1000 , 999999 ) and ( TYPE , 1 , int , 19500,19500 ) . The rest of the attribute ... becomes functionally dependent on every subset of attributes in the file . In other words , the following are among ...
... become ( PRODUCT - NO , 15 , int , 1000 , 999999 ) and ( TYPE , 1 , int , 19500,19500 ) . The rest of the attribute ... becomes functionally dependent on every subset of attributes in the file . In other words , the following are among ...
Page 41
... become essential in information retrieval ( IR ) . NDBs differ from traditional bibliographic databases ( BDBs ) ... becoming more and more popular : in 1982 about one half of the thousand databases covered by a survey were numeric . Today ...
... become essential in information retrieval ( IR ) . NDBs differ from traditional bibliographic databases ( BDBs ) ... becoming more and more popular : in 1982 about one half of the thousand databases covered by a survey were numeric . Today ...
Contents
USER CHARGING | 13 |
THE RELATIONAL DATA MODEL | 20 |
CARDINALITY ESTIMATION IN NUMERIC ONLINE | 32 |
Copyright | |
7 other sections not shown
Common terms and phrases
A-names access strategy Appendix approach attribute description set attribute name set attribute selectivity attribute values attributes PRODUCT-NO basis BDBs candidate keys cardinality estimation charging methods CODATA components computed connect-time considered constructed data model database files Database Management Database Management Systems database user developed elementary predicates English Summary example expression F1 and F2 FD-set file design file organization file structures Finland functional dependencies implementation information retrieval Information Science intermediate files inverted file Järvelin join attribute join predicate julkaisuja manipulation MANUF-NO MARKET-SHARE methodology n-tuple NDBs Numeric Databases online databases operand file description procedure cost model processing cost PRODUCTS file QSALES query cardinality query cost modelling query negotiation query optimization query processing query results r-card r-description RA operations records relational algebra relational data model restriction predicate result file description SIGMOD sort-key storage parameters Systems TAHITI TRADEMARK TYPE unit charges University of Tampere upper bound user charge estimation vendor