User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 6
... attribute description set ( see below ) , and ⚫ the functional dependency set ( see below ) . File names are ... name , e.g. PRODUCT - NO , ⚫ the attribute selectivity , e.g. 250000 , · ⚫ the domain , e.g. int ( for integers ) ...
... attribute description set ( see below ) , and ⚫ the functional dependency set ( see below ) . File names are ... name , e.g. PRODUCT - NO , ⚫ the attribute selectivity , e.g. 250000 , · ⚫ the domain , e.g. int ( for integers ) ...
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... attribute name , S , is the attribute selectivity , S , e int , D. is some primitive type ( int , real , char ) , the domain of the attribute , lv , is the lower bound of possible values of the attribute ; if D ; = char then lv1 = λ ...
... attribute name , S , is the attribute selectivity , S , e int , D. is some primitive type ( int , real , char ) , the domain of the attribute , lv , is the lower bound of possible values of the attribute ; if D ; = char then lv1 = λ ...
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... name , e.g. PRODUCTS , the file cardinality , e.g. 250000 , the attribute description set , the functional dependency set , the organization description , and the cost associated with the file . The last four items in the list are ...
... name , e.g. PRODUCTS , the file cardinality , e.g. 250000 , the attribute description set , the functional dependency set , the organization description , and the cost associated with the file . The last four items in the list are ...
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