User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 16
... Functional dependencies and file descriptions for restrictions The derivation of functional dependencies for restrictions has been considered earlier in [ NiJä - 85 ] . The idea of the derivation method is that restrictions do not ...
... Functional dependencies and file descriptions for restrictions The derivation of functional dependencies for restrictions has been considered earlier in [ NiJä - 85 ] . The idea of the derivation method is that restrictions do not ...
Page 20
A Methodology Kalervo Järvelin. 5.3 . Functional dependencies and whole file descriptions for joins The construction of the functional dependency descriptions has been considered earlier in [ NiJä - 85 ] . Joins never destroy any of the ...
A Methodology Kalervo Järvelin. 5.3 . Functional dependencies and whole file descriptions for joins The construction of the functional dependency descriptions has been considered earlier in [ NiJä - 85 ] . Joins never destroy any of the ...
Page 9
... functional dependency set , the organization description , and the cost associated with the file . The last four ... dependencies as A → B , where A and B are sets of attribute names . The attributes named in A functionally determine ...
... functional dependency set , the organization description , and the cost associated with the file . The last four ... dependencies as A → B , where A and B are sets of attribute names . The attributes named in A functionally determine ...
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