User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 32
... operations ( or their implementations ) , namely restriction , projection and join , are considered . These operations are the most important RA operations : they extend the traditional set operations in an essential way and are the ...
... operations ( or their implementations ) , namely restriction , projection and join , are considered . These operations are the most important RA operations : they extend the traditional set operations in an essential way and are the ...
Page 8
... operations In this section , the use of the three most important RA operations - namely restrictions , equi - joins and projections - and the notations associated to them are illustrated . Readers who are not familiar with these operations ...
... operations In this section , the use of the three most important RA operations - namely restrictions , equi - joins and projections - and the notations associated to them are illustrated . Readers who are not familiar with these operations ...
Page 10
... operations . The outline of the types of functions required for each operation in the component construction is given in fig . 3. Together such functions form the cardinality estimation model of each operation . In fig . 3 , op - card ...
... operations . The outline of the types of functions required for each operation in the component construction is given in fig . 3. Together such functions form the cardinality estimation model of each operation . In fig . 3 , op - card ...
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