User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 27
... developed in this study can be extended to database maintenance cost estimation , as is shown in [ Järv - 84b ] [ Järv - 85a ] . The subproblems are considered , and their solutions are presented , in Parts I , II and III of this study ...
... developed in this study can be extended to database maintenance cost estimation , as is shown in [ Järv - 84b ] [ Järv - 85a ] . The subproblems are considered , and their solutions are presented , in Parts I , II and III of this study ...
Page 30
... developed , in [ 55 ] . 7. DISCUSSION An approach to query cost modelling in NDBS has been developed , and its use has been demonstrated with a simple sample query . In this chapter , the need for , and essential properties of the ...
... developed , in [ 55 ] . 7. DISCUSSION An approach to query cost modelling in NDBS has been developed , and its use has been demonstrated with a simple sample query . In this chapter , the need for , and essential properties of the ...
Page
... developed in this study in the context of the RDM . The databases are represented by the file descriptions , the hw / sw environment by the storage parameters , and the user queries by RA expressions and their implementation procedure ...
... developed in this study in the context of the RDM . The databases are represented by the file descriptions , the hw / sw environment by the storage parameters , and the user queries by RA expressions and their implementation procedure ...
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