性上瘾
发表于 2025-3-27 00:20:14
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创新
发表于 2025-3-27 02:26:46
Horst PöttkerisDB system, we try to provide visual support not only for the query specification process. but also for evaluating query results and. thereafter, refining the query accordingly. The main idea of our system is to represent as many data items as possible by the pixels of the display device. By arrang
修正案
发表于 2025-3-27 07:08:31
Christian Schichaion domains into field and object-based applications, we divide these methods into field and object-based representation and manipulation methods. In field-based representation, the geographic space is partitioned (tessellated) into cells that are disjoint and that collectively cover the entire geog
insomnia
发表于 2025-3-27 12:21:14
Christiane Schulzki-Haddoutirt at Les Arcs, France. The director of this ASI was A. K. Sood and A. H. Qureshi was the co-director. Since its introduction in the early 1970s the relational data model has been widely accepted. Several research and industrial efforts are being undertaken to develop special purpose database machin
勾引
发表于 2025-3-27 14:13:52
Peter Ludescy in implementing database management functions. However, most of the efforts have been directed toward developing database computers for supporting a relatively primitive data model, namely, the relational model. This paper presents the design and performance evaluation of an Object Flow Computer
可耕种
发表于 2025-3-27 18:08:12
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禁止
发表于 2025-3-28 01:45:10
Johannes Ludwig Diego (Sept. 82). The workshop is aimed at providing an interchange of ideas and experience on computer systems designed to perform database operations more efficiently than general purpose computers with a software database management system. Many proposals have been published during the past 10 y
大包裹
发表于 2025-3-28 03:30:38
Manfred Redelfsuery containment both in the absence and presence of constraints. Containment without constraints for CRPQs is EXPSPACE-complete, as opposed to only NP-complete for relational conjunctive queries. Our past experience with implementing similar algorithms suggests that staying in PSPACE might still be
Allure
发表于 2025-3-28 09:04:36
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Mettle
发表于 2025-3-28 13:19:51
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