## User Charge Estimation in Numeric Online Databases: A Methodology |

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Page 14

The procedure is as follows the

: • All elementary predicates of a general predicate referring the same attribute

name are recognized by the

...

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

**function**a - preds . For example , let PRED = ( TYPE...

Page 18

A Methodology Kalervo Järvelin. the common range length ( cr ) of the join

attributes is recognized as above ( the

maximum number of common values within the common range cv is estimated on

the ...

A Methodology Kalervo Järvelin. the common range length ( cr ) of the join

attributes is recognized as above ( the

**function**cr - length in the Appendix ) • themaximum number of common values within the common range cv is estimated on

the ...

Page 28

Let a and b be any integers , such that a 2 b . a - b , if a > b sub ( a , b ) = 1 ,

otherwise . PREDICATE MANIPULATION Given a general predicate PRED , the

PRED ...

Let a and b be any integers , such that a 2 b . a - b , if a > b sub ( a , b ) = 1 ,

otherwise . PREDICATE MANIPULATION Given a general predicate PRED , the

**function**elem - set ( PRED ) gives the set of the elementary predicates of whichPRED ...

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### Contents

NUMERIC DATABASES | 4 |

USER CHARGING | 13 |

THE RELATIONAL DATA MODEL | 20 |

Copyright | |

7 other sections not shown

### Common terms and phrases

A-names actual addition advance Appendix applications approach arguments associated assumed attribute description set attribute name basis BDBs block bound cardinality estimation characteristics combined communication complex components computed considered constructed contain context cost estimation COUNTRY database defined definition derived described developed distributions elementary predicates English Summary essential example expression extended file descriptions formal function functional dependencies given gives implementation intermediate join join attribute lower Management manipulation MARKET-SHARE MARKETS means method methodology NDBs necessary needed operand file operations optimization organization parameters possible printed problems procedure processing processing-based PRODUCT PRODUCT-NO projection query cost modelling RA operations range records references relational represented respect restriction result result file retrieved sample query selectivity Services sort sources standard storage structure Systems TAHITI Tampere TRADEMARK transfer TYPE unit user charge estimation values