User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 16
... restriction predicate , and the name of the attribute under consideration as their arguments . For example , in the sample restriction on the PRODUCTS file the lower and upper bounds of the attributes PRODUCT - NO and TYPE are r - l ...
... restriction predicate , and the name of the attribute under consideration as their arguments . For example , in the sample restriction on the PRODUCTS file the lower and upper bounds of the attributes PRODUCT - NO and TYPE are r - l ...
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... restrictions on the PRODUCTS and MARKETS files denoted by restriction ( P , ( TYPE , = , 19500 ) ) and restriction ( M , pred 1 ) . The operation charge model r - charge , defined in the Appendix , computes the file description for the ...
... restrictions on the PRODUCTS and MARKETS files denoted by restriction ( P , ( TYPE , = , 19500 ) ) and restriction ( M , pred 1 ) . The operation charge model r - charge , defined in the Appendix , computes the file description for the ...
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... RESTRICTION PROCEDURE COST MODEL 4.1 . Cardinalities , attribute descriptions and FD descriptions for restrictions The methodology and functions for estimating the cardinalities of the results of restrictions and for constructing the ...
... RESTRICTION PROCEDURE COST MODEL 4.1 . Cardinalities , attribute descriptions and FD descriptions for restrictions The methodology and functions for estimating the cardinalities of the results of restrictions and for constructing 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