User Charge Estimation in Numeric Online Databases: A Methodology |
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... records satisfy the predicates of queries ( e.g. how many products with market - share over 30 % are listed in a market data file for the year 1986 ) . In the context of NDBs , the term cardinality ( or size , [ BGWR - 81 ] [ PiCo - 84 ] ...
... records satisfy the predicates of queries ( e.g. how many products with market - share over 30 % are listed in a market data file for the year 1986 ) . In the context of NDBs , the term cardinality ( or size , [ BGWR - 81 ] [ PiCo - 84 ] ...
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... records are still being retrieved . If all the records were retrieved before sending the first to the user terminal , the response time would depend heavily on the number of records . retrieved , growing normally by one second for each ...
... records are still being retrieved . If all the records were retrieved before sending the first to the user terminal , the response time would depend heavily on the number of records . retrieved , growing normally by one second for each ...
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... records on 15 PRODUCT - NOS and 14 TRADEMARKS etc. The second restriction returns some 125,000 records for over 62,000 PRODUCT #s sold in one country ( TAHITI ) during 1984. The user charges of these intermediate results are as follows ...
... records on 15 PRODUCT - NOS and 14 TRADEMARKS etc. The second restriction returns some 125,000 records for over 62,000 PRODUCT #s sold in one country ( TAHITI ) during 1984. The user charges of these intermediate results are as follows ...
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