User Charge Estimation in Numeric Online Databases: A Methodology |
From inside the book
Results 1-3 of 33
Page
... names must be unique in a file description , i.e. an , an , when ij . Each six - tuple ad = ( an ,, S ,, D ,, lv ,, uv ,, C , ) is the attribute description for the attribute named an ,, e.g. ad1 ( product - no , 250000 , int , 1000 ...
... names must be unique in a file description , i.e. an , an , when ij . Each six - tuple ad = ( an ,, S ,, D ,, lv ,, uv ,, C , ) is the attribute description for the attribute named an ,, e.g. ad1 ( product - no , 250000 , int , 1000 ...
Page
... a general cavnf - predicate , say pred1 = ( COUN- TRY ,, TAHITI ) ^ ( YEAR , = , 1984 ) , the function elem - set ... names and that the value component belongs to the domain of that attribute . For example , v - pred ( p1,03 ( M ) ) is true ...
... a general cavnf - predicate , say pred1 = ( COUN- TRY ,, TAHITI ) ^ ( YEAR , = , 1984 ) , the function elem - set ... names and that the value component belongs to the domain of that attribute . For example , v - pred ( p1,03 ( M ) ) is true ...
Page
... following function a - preds ( PRED , a - name ) is used further below to give all the elementary predicates of PRED on the attribute name a - name . DEFINITION A6 . Let PRED be a cavnf - predicate and a - name an attribute name . a - preds ...
... following function a - preds ( PRED , a - name ) is used further below to give all the elementary predicates of PRED on the attribute name a - name . DEFINITION A6 . Let PRED be a cavnf - predicate and a - name an attribute name . a - preds ...
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