User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 27
... later studies . Also the cost of maintaining the NDBS falls outside the scope of the study . However , the approach developed in this study can be extended to database maintenance cost estimation , as is shown in [ Järv - 84b ] [ Järv ...
... later studies . Also the cost of maintaining the NDBS falls outside the scope of the study . However , the approach developed in this study can be extended to database maintenance cost estimation , as is shown in [ Järv - 84b ] [ Järv ...
Page 8
... later below . Third , the attribute range representation by the lower and upper bound values is a special case of the approach proposed in [ PiCo - 84 ] which so provides one direction for extensions in cardinality estimation of some RA ...
... later below . Third , the attribute range representation by the lower and upper bound values is a special case of the approach proposed in [ PiCo - 84 ] which so provides one direction for extensions in cardinality estimation of some RA ...
Page 14
... later in this paper , the following sample storage parameters are assumed : sp ' = ( 2048 , 1024,0.75,0.75,8,2,4,30,512,256 , 20000,20,400,8 ) . In other words , the seek time is 30 ms , the net transfer rate is 256 bytes / ms , etc ...
... later in this paper , the following sample storage parameters are assumed : sp ' = ( 2048 , 1024,0.75,0.75,8,2,4,30,512,256 , 20000,20,400,8 ) . In other words , the seek time is 30 ms , the net transfer rate is 256 bytes / ms , etc ...
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