User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 24
... described independently of their technical implementation . One might add that the relational completeness of the RDM allows the derivation of any relation derivable from the database with first - order predicate logic . Tabular ...
... described independently of their technical implementation . One might add that the relational completeness of the RDM allows the derivation of any relation derivable from the database with first - order predicate logic . Tabular ...
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... described . In other words , each file in the database must be described and in addition , the descriptions of intermediate files of a query must be deduced on the basis of the characteristics of the query and the permanent files . The ...
... described . In other words , each file in the database must be described and in addition , the descriptions of intermediate files of a query must be deduced on the basis of the characteristics of the query and the permanent files . The ...
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... described in AD1 and AD2 , e.g. j - pred ( ( PRODUCT - NO , = , PRODUCT # ) , 03 ( P ) , 03 ( M ) ) = true . The reverse predicate of a join predicate jp , denoted by jp * , switches the positions of the attribute names , e.g. if jp ...
... described in AD1 and AD2 , e.g. j - pred ( ( PRODUCT - NO , = , PRODUCT # ) , 03 ( P ) , 03 ( M ) ) = true . The reverse predicate of a join predicate jp , denoted by jp * , switches the positions of the attribute names , e.g. if jp ...
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