User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 20
... operand FDs and the join attribute dependencies . These are the only FDs that can be derived with certainty on the basis of the operand FD - sets and the join - i.e. without knowing how the operands have been derived . This is the idea ...
... operand FDs and the join attribute dependencies . These are the only FDs that can be derived with certainty on the basis of the operand FD - sets and the join - i.e. without knowing how the operands have been derived . This is the idea ...
Page 25
A Methodology Kalervo Järvelin. the operand file description , and sk = sk ( F ) if the operand sort order is preserved , and otherwise sk = 2 . The construction of all components of the result file description of any restriction has now ...
A Methodology Kalervo Järvelin. the operand file description , and sk = sk ( F ) if the operand sort order is preserved , and otherwise sk = 2 . The construction of all components of the result file description of any restriction has now ...
Page 26
... operand files , is considered in this chapter . The construction of the components CARD , AD , and FD of the result file description is first summarized on the basis of [ 22 ] . The definitions of the functions for constructing these ...
... operand files , is considered in this chapter . The construction of the components CARD , AD , and FD of the result file description is first summarized on the basis of [ 22 ] . The definitions of the functions for constructing these ...
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