User Charge Estimation in Numeric Online Databases: A Methodology |
From inside the book
Results 1-3 of 17
Page 14
... elementary predicates on one attribute . The procedure is as follows ( the functions referred to are defined in the Appendix ) : All elementary predicates of a general predicate referring the same attribute name are recognized by the ...
... elementary predicates on one attribute . The procedure is as follows ( the functions referred to are defined in the Appendix ) : All elementary predicates of a general predicate referring the same attribute name are recognized by the ...
Page 28
... PREDICATE MANIPULATION Given a general predicate PRED , the function elem - set ( PRED ) gives the set of the elementary predicates of which PRED consists , e.g elem - set ( ( COUNTRY , = , TAHITI ) ^ ( YEAR ,, 1984 ) ) = { ( COUNTRY ...
... PREDICATE MANIPULATION Given a general predicate PRED , the function elem - set ( PRED ) gives the set of the elementary predicates of which PRED consists , e.g elem - set ( ( COUNTRY , = , TAHITI ) ^ ( YEAR ,, 1984 ) ) = { ( COUNTRY ...
Page 24
... predicates with the following properties : • elementary predicates between an attribute name and a value , elementary predicates between two attribute names , comparison operators among ( = , < , > , < , 2 ) in elementary predicates ...
... predicates with the following properties : • elementary predicates between an attribute name and a value , elementary predicates between two attribute names , comparison operators among ( = , < , > , < , 2 ) in elementary predicates ...
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