User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 8
... constructed by choosing the attributes PRODUCT - NO , TRADEMARK and MARKET - SHARE . The restriction operation is applied twice in the first phase , followed by an equi - join and a projection in the second and third phases . The ...
... constructed by choosing the attributes PRODUCT - NO , TRADEMARK and MARKET - SHARE . The restriction operation is applied twice in the first phase , followed by an equi - join and a projection in the second and third phases . The ...
Page 23
... constructed in a very straigthforward way the attribute descriptions of the projected attributes are included as such into the attribute description set of the result file description . No changes in the attribute selectivities or lower ...
... constructed in a very straigthforward way the attribute descriptions of the projected attributes are included as such into the attribute description set of the result file description . No changes in the attribute selectivities or lower ...
Page 25
... constructed by collecting these components into a six - tuple . The function r - description performs this by giving the result the name A , by using the functions r - card , r - a - descr , r - fd , and m - search - cost to construct ...
... constructed by collecting these components into a six - tuple . The function r - description performs this by giving the result the name A , by using the functions r - card , r - a - descr , r - fd , and m - search - cost to construct ...
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