User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 1
... references , which as such are not usually of interest to the database user . Information needs are usually not satisfied before the referred documents or information have been made available . Although references to potentially ...
... references , which as such are not usually of interest to the database user . Information needs are usually not satisfied before the referred documents or information have been made available . Although references to potentially ...
Page 7
... references . This is not possible in files employing e.g. the sequential file organization : every reference should ... references and e ) possibly repetition of the query as such or in a modified form in other files of the database ...
... references . This is not possible in files employing e.g. the sequential file organization : every reference should ... references and e ) possibly repetition of the query as such or in a modified form in other files of the database ...
Page 13
... references - and these are what they actually buy . In connect - time based charging , however , the search costs do not depend on search results - the charge grows even though no references are retrieved . This situation makes the ...
... references - and these are what they actually buy . In connect - time based charging , however , the search costs do not depend on search results - the charge grows even though no references are retrieved . This situation makes the ...
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