subcutaneous 发表于 2025-3-21 19:58:50

书目名称ICDT ‘90影响因子(影响力)<br>        http://figure.impactfactor.cn/if/?ISSN=BK0460101<br><br>        <br><br>书目名称ICDT ‘90影响因子(影响力)学科排名<br>        http://figure.impactfactor.cn/ifr/?ISSN=BK0460101<br><br>        <br><br>书目名称ICDT ‘90网络公开度<br>        http://figure.impactfactor.cn/at/?ISSN=BK0460101<br><br>        <br><br>书目名称ICDT ‘90网络公开度学科排名<br>        http://figure.impactfactor.cn/atr/?ISSN=BK0460101<br><br>        <br><br>书目名称ICDT ‘90被引频次<br>        http://figure.impactfactor.cn/tc/?ISSN=BK0460101<br><br>        <br><br>书目名称ICDT ‘90被引频次学科排名<br>        http://figure.impactfactor.cn/tcr/?ISSN=BK0460101<br><br>        <br><br>书目名称ICDT ‘90年度引用<br>        http://figure.impactfactor.cn/ii/?ISSN=BK0460101<br><br>        <br><br>书目名称ICDT ‘90年度引用学科排名<br>        http://figure.impactfactor.cn/iir/?ISSN=BK0460101<br><br>        <br><br>书目名称ICDT ‘90读者反馈<br>        http://figure.impactfactor.cn/5y/?ISSN=BK0460101<br><br>        <br><br>书目名称ICDT ‘90读者反馈学科排名<br>        http://figure.impactfactor.cn/5yr/?ISSN=BK0460101<br><br>        <br><br>

慢慢冲刷 发表于 2025-3-21 21:30:07

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Mets552 发表于 2025-3-22 04:14:53

Playing games with objects,An extension of Ehrenfeucht-Fraissé games for complex objects is exhibited and shown to characterize an extension of relational calculus to complex objects. The games are used to prove expressibility results about the calculus.

Aesthete 发表于 2025-3-22 05:46:36

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中子 发表于 2025-3-22 10:41:39

On the expressive power of the relational calculus with arithmetic constraints,We investigate the expressive power of the relational calculus with arithmetic constraints. We show that any generic query in this language is equivalent to some query in the standard relational calculus. As a result, transitive closure and parity cannot be expressed even with arithmetic constraints.

Locale 发表于 2025-3-22 12:58:14

https://doi.org/10.1007/3-540-53507-1Automat; Datenbanken; Inform; Wissensbasierte Systeme; data structure; database; database theory; databases

Capitulate 发表于 2025-3-22 19:29:04

978-3-540-53507-2Springer-Verlag Berlin Heidelberg 1990

Ibd810 发表于 2025-3-22 22:32:04

ICDT ‘90978-3-540-46682-6Series ISSN 0302-9743 Series E-ISSN 1611-3349

CRAB 发表于 2025-3-23 02:36:02

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GROSS 发表于 2025-3-23 08:51:38

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查看完整版本: Titlebook: ICDT ‘90; Third International Serge Abiteboul,Paris C. Kanellakis Conference proceedings 1990 Springer-Verlag Berlin Heidelberg 1990 Autom