User Charge Estimation in Numeric Online Databases: A Methodology |
From inside the book
Results 1-3 of 28
Page 2
... context of NDBs these trends create new problems because the charges based on query results or query processing costs depend on factors that the users cannot be expected to master , and the charges may vary over a very broad range . The ...
... context of NDBs these trends create new problems because the charges based on query results or query processing costs depend on factors that the users cannot be expected to master , and the charges may vary over a very broad range . The ...
Page 24
... context of the RDM , recent trends show clearly that the RDM will very likely be an essential data model for many important types of NDBs . For example , systems and work based on the RDM are described in many recent studies on ...
... context of the RDM , recent trends show clearly that the RDM will very likely be an essential data model for many important types of NDBs . For example , systems and work based on the RDM are described in many recent studies on ...
Page 11
... context ) gives the selectivity of the attribute an ( the file is obvious in the context ) gives the domain of the attribute an gives the number of accession lists of the index on in These symbols are also used without the ' arguments ...
... context ) gives the selectivity of the attribute an ( the file is obvious in the context ) gives the domain of the attribute an gives the number of accession lists of the index on in These symbols are also used without the ' arguments ...
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