User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 6
... components of operand files have an obvious meaning in the estimation of the cardinalities of the results . The attribute description set describes the properties of each attribute in a file . This component is a set of attribute ...
... components of operand files have an obvious meaning in the estimation of the cardinalities of the results . The attribute description set describes the properties of each attribute in a file . This component is a set of attribute ...
Page 27
... components always refer to the first or only operand of the RA operation under consideration , and the second components to the ( possible ) second operand . GENERAL ELEMENTARY FUNCTIONS In order to be able to separate and manipulate ...
... components always refer to the first or only operand of the RA operation under consideration , and the second components to the ( possible ) second operand . GENERAL ELEMENTARY FUNCTIONS In order to be able to separate and manipulate ...
Page 9
... components of operand files have an obvious significance in estimating of the cardinalities of the results ( e.g. [ 16 ] ) . The rest of the components are briefly explained below . Formal definitions of the components attribute ...
... components of operand files have an obvious significance in estimating of the cardinalities of the results ( e.g. [ 16 ] ) . The rest of the components are briefly explained below . Formal definitions of the components attribute ...
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