User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 5
... reasons for this situation are : the relative novelty of NDBs ; end - users have in many cases used the databases without the assistance of intermediaries ; except for the last few years , there has been no training in NDBs available in ...
... reasons for this situation are : the relative novelty of NDBs ; end - users have in many cases used the databases without the assistance of intermediaries ; except for the last few years , there has been no training in NDBs available in ...
Page 9
... reasons for this . Erroneous data on exchange rates of currencies or shares , side - effects of medicines or toxicity of chemical compounds may cause disasters . The better validated the data are , the more one has to pay for them ...
... reasons for this . Erroneous data on exchange rates of currencies or shares , side - effects of medicines or toxicity of chemical compounds may cause disasters . The better validated the data are , the more one has to pay for them ...
Page 33
... reason , it has been necessary to rely heavily on earlier publications ( especially [ Järv - 85a ] [ Järv - 85b ] ) , where formal and informal definitions are given , and to deal with some user charge estimation functions in quite ...
... reason , it has been necessary to rely heavily on earlier publications ( especially [ Järv - 85a ] [ Järv - 85b ] ) , where formal and informal definitions are given , and to deal with some user charge estimation functions in quite ...
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