User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 8
... RA operations . Due to the simplicity of the use of the FDs they could ( and should ) be used to improve the estimates also in the non - standard approaches , e.g. [ Chris - 83a ] [ Chris ... RA operations 1 448 13 13 14 16 222 20 25 25 27 1.
... RA operations . Due to the simplicity of the use of the FDs they could ( and should ) be used to improve the estimates also in the non - standard approaches , e.g. [ Chris - 83a ] [ Chris ... RA operations 1 448 13 13 14 16 222 20 25 25 27 1.
Page 10
... RA operations [ YuLi - 82 ] [ Rich - 81 ] . The characteristics of the results of the operations are different from the characteristics of their operands . Therefore , in order to derive the result file descriptions correctly , it is ...
... RA operations [ YuLi - 82 ] [ Rich - 81 ] . The characteristics of the results of the operations are different from the characteristics of their operands . Therefore , in order to derive the result file descriptions correctly , it is ...
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... RA operations and their implementation procedures . This specification covers a representative class of RA queries consisting of restrictions , joins and projections . The specification can be extended to other RA operations and their ...
... RA operations and their implementation procedures . This specification covers a representative class of RA queries consisting of restrictions , joins and projections . The specification can be extended to other RA operations and their ...
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