relational database query 中文意思是什麼

relational database query 解釋
關系數據庫詢問
  • relational : adj. 有關系的；親戚的；（特指語法上）表示關系的。adv. -ly
  • query : n 1 質問；詢問；疑問，懷疑。2 敢問，請問〈在疑問句前單獨使用〉。3 【印刷】（打在原稿或校樣上的）...
  1. Third, this dissertation analyzes the complicacy of result size estimation problem for xml structure based query optimization compared to its counterpart in traditionally relational database, and proposes a full - featured result size estimation algorithm for xml query, sxm. for simple path expression query, this dissertation proposes a dynamic synopsis model for xml data based on the concept of f - stable and b - stable, xmap. for complicated path expression query, this dissertation adopts an improved bifocal sampling method for result size estimation

    第三，分析了xml結構化查詢優化中的查詢代價估計問題與傳統關系型數據庫中的查詢代價估計問題的區別，提出了一套完整的xml結構化查詢代價估計體系sxm ，包括對簡單路徑表達進行查詢代價估計的動態xml數據統計模型xmap ，對復雜路徑表達進行查詢代價估計的雙焦點例舉法，以及對值匹配條件進行查詢代價估計的基於小波的多維直方圖方法，並能將多種查詢表達的查詢代價估計結果結合在一起，以給出一個完整的xpath查詢的代價估計。
  2. Involuntarily, questions of these engineering datas " management appear, datas " persistance only depending relational model and rdbms is greatly insufficient, so this paper carefully studies object - relational mapping based on rdbms based on the analyse of home & overseas actualities, correlative theories and realizing methods of object - relational mapping, we find opl based on rdbms is the most suitable for object relatinoal mapping of clera. based on the engineering application analyse of opl in clera, function requirements, database modes, interface criterions and functions, running modes of opl have being detailedly described. with the framework of microsoft dna, a kind of realizing method of opl based on com / dcom / activex component technology has being brought forward, and this paper describes realizing keys from base tables " definition, object id and class hx class and inheritance of class, object storage, parallel control and affair, object query, object nesting, relations between objects, support of complex data types, right control of object and buffer management of object

    本文在分析對象?關系映射技術的國內外現狀、相關理論及實現方法的基礎上，研究發現基於rdbms的opl是目前最適合clera的對象?關系映射方法；在clera的opl應用分析的基礎上，詳細描述了opl的功能要求、數據庫模式、介面規范與功能、運行方式等內容；結合microsoftdna開發框架，提出了一種基於com dcom activex組件技術的opl實現思路，並從基本表定義、對象標識與類標識、類與類繼承、對象存儲、並發控制與事務、對象查詢、對象嵌套、對象間聯系、復雜數據類型的支持、對象級權限控制及對象緩沖管理等幾方面概述了實現要點。
  3. Analysis of query methods for spatial data in relational database

    關系數據庫管理空間數據的方式下數據查詢方法的研究
  4. The thesis has implemented the datatype model of the air transportation information system database with the objected - oriented relational database oracle9i using the structured query language, loaded the air transportation information into the database and built the view of the database considering the needs of the application

    本文應用面向對象的大型關系數據庫產品oracle9i建立了空中交通管理信息數據庫的數據模型，將空中交通信息導入空中交通管理信息數據庫，同時根據數據庫應用開發的需要建立了應用開發視圖。
  5. Therefore, more challenges have arisen for query optimization in database grid than traditional distributed database. following this observation, the design of a query optimizer in dartgrid ii is presented, and a heuristic, dynamic and parallel query optimization approach to processing query in database grid is proposed. a set of semantic tools supporting relational database integration and semantic - based information browsing has also been implemented to realize the above vision

    克服數據庫網格特性所帶來的困難需要為數據庫網格提供全局一致的數據表達模式各結點數據模式到全局模式之間的映射方法各結點之間負載平衡和結點動態加入和退出系統的控制策略數據庫網格查詢優化器結構設計以及一整套適合數據庫網格的查詢優化演算法。
  6. This radar database system fits for china ' s radar network using object - oriented programming design method, recording some important parameters of radar data : the longitude, latitude of radar station, radar type, radar wavelength, radar data format, weather kind ( kind of intensity radar echo, schema of velocity radar, echo shape ) embodying in the radar data, etc. it also records the weather course information embodying in a series of relational radar data : the beginning time of weather course, the ending time of weather course, weather type, etc and the disk information, including recording time, recording contents, recording data number and weather type, etc. above all, this system realizes some basic operational processing : adding, deletion, updating, query of records and also some assistant functions : exportation, data transformation, displaying, backing up of data

    該數據庫系統採用面向對象程序設計方法，用visualc + + 6 . 0作為應用程序的前端開發工具，用microsoftaccess2000做數據庫，不僅實現了對雷達基數據信息的一些基本操作：記錄信息添加、刪除、修改、查詢，還實現了處理、分析雷達基數據所需的一些操作：數據導出，數據格式轉換、數據回顯（圖像方式和動畫方式） 、數據壓縮、備份等，另外針對日前雷達臺站存儲雷達數據的現狀，還實現了對存儲光盤的管理。
  7. Under the background of alot material under distributed computing environment, this paper emphasizes to study three key problems : the integration of relational database, the design of database query optimization and alot material

    本文以分佈環境下物資分配過程為現實背景，著重研究了其中的三個主要問題:關系數據庫的集成、數據庫的查詢優化設計和物資分配問題。
  8. I study mainly the storage of record and object, and bring forward the method of storage when the instance of object is embodied inside of record. 3 ) in the aspect of indexing, i presented a method that is generalized b - tree ( gbt ) and combining technique of founction template of c + + build the universal algorithm of queries, insert and delete. 4 ) finally, i analyze deeply and improve the query processing system of ormdbms, and confirm performance algorithm of linking and queries based on relational database. management system ( rdbms )

    在系統結構和特性中分析了系統所採用的兩層體系結構，並且詳細探討了在設計和實現數據庫時所涉及到的幾個主要問題：支持復雜對象、類型擴充、繼承機制和規則系統等；在存儲機制的討論中，主要研究了記錄和對象以及包含了對象實例記錄的存儲方法；在索引技術研究中，本文提出了類屬b樹的索引方法，通過c + +的函數模板技術給出了通用類屬b樹查詢、插入及其刪除的基本演算法；最後，文章以關系數據庫為基礎，深入分析並改進了在對象關系多媒體數據庫中的查詢處理系統，確定了選擇和連接操作的具體演算法。
  9. We mainly study the query optimization technique of relational database systems. based on the requirement of the cbase, we put forward a suit of rewriter rules that are used in query optimization module

    本文主要研究了關系數據庫中的查詢優化技術，並且根據cbase數據庫系統的需求，提出了一套完整的查詢重寫規則用於查詢優化模塊。
  10. Sql server compact edition is a powerful, yet lightweight relational database engine that makes it easy to develop desktop applications by supporting familiar structured query language syntax and providing a development model and api consistent with sql server

    Sql server compact edition是功能強大又輕巧的關聯式資料庫引擎，可支援常用的結構化查詢語言structured query language ， sql語法，並提供與sql server一致的研發模式及api ，因此可便於開發供桌上型電腦使用的應用程式。
  11. Sql server 2005 compact edition is a powerful, yet lightweight relational database engine that makes it easy to develop desktop applications by supporting familiar structured query language syntax and providing a development model and api consistent with sql server

    Sql server 2005 compact edition是功能強大又輕巧的關聯式資料庫引擎，可支援常用的結構化查詢語言structured query language ， sql語法，並提供與sql server一致的研發模式及api ，因此可便於開發供桌上型電腦使用的應用程式。
  12. Query relational database with xpath

    使用xpath查詢關系數據庫
  13. The sql server mobile query processor is a powerful tool for querying data stored in your relational database

    Sql server mobile查詢處理器是查詢關系數據庫中存儲數據的強大工具。
  14. In the paper, we firstly introduce database technologies into ontology storing, put farther forward a directly storing method from ontology to relational database, this method makes for advancing efficiency for ontology storing and query. secondly, we ameliorate rdf / owl ontology storing arithmetics : rdf2rdb and owl2rdb, experiments prove these betterments can improve query efficiency for ontology data stored. whereafter, we study the reverse technique from relational database to ontology, put forward a method from relational pattern to owl, it proves to be valid through an example

    本文首先將數據庫技術引入到本體存儲中，進而提出了本體向關系數據庫直接存儲的方法，該方法可以提高本體存儲和查詢效率;另外研究並改進了rdf和owl本體的關系模式存儲演算法rdf2rdb 、 owl2rdb ，實驗表明兩種方法可以有效提高本體存儲后的查詢性能;然後研究了關系模式下的數據反向到本體的技術，提出了關系模式向owl本體映射的方法，並以實例證實方法的可行性。
  15. The expressive power of xquery is comparable to the criterion of relational completeness " defined for database query languages, though no such formal standard has been defined for an xml data model

    Xquery的表達能力可以與為數據庫查詢語言定義的「關系完整性」標準相比，雖然還沒有為xml數據模型定義這樣的正式標準。
  16. The system highly incorporates data source selection module, data pretreatment module, data exploration module, data mining module and knowledge representation module, and makes data pretreatment by taking the advantage of some tools of relational database like query, and data transformation

    系統將數據挖掘過程分成數據源選擇、數據預處理、數據分析、挖掘演算法、模式表達幾個部分。在進行數據挖掘的過程中用戶可以分別與之交互，體現了系統的靈活性以及提高了數據挖掘的質量。
  17. To persistence the objects there are two common approach. one approach is that structured query language ( sql ) codeis embedded in the source code of your classes. the other approach is that sql statements for your business classes are encapsulated in one or more " data classes. " the disadvantage is that it directly couples your business classes with the schema of your relational database, implying that a simple change such as renaming a column or porting to another database results in a rework of your source code

    實現在關系數據庫存取對象，常用的做法有：一種方法是在對象中直接編寫sql代碼來存取對象，另一種方法是將sql代碼在專門的數據類（或存儲過程）中編寫，但著兩種方式都使得對象模型與關系數據庫模式的耦合度大，不容易維護，因為關系數據庫模式的微小改動，都將導致應用程序的重新編譯。
  18. Query relational database with xpath or sql

    Xpath或sql查詢相關資料庫如同
  19. Whereas most orm solutions map a class to a relational database schema, hybrid frameworks like ibatis map classes to the result of an sql query

    大多數的orm解決方案把一個類映射到一個關系數據庫模式，而諸如ibatis之類的混合框架則把類映射到一個sql查詢的結果。
  20. Note that while database maintenance and query operations are performed under the auspices of the rdbms, real - time performance for telemetry and calculated point update can only be achieved by supplementing the relational database with a distributed memory - resident, real - time subset

    注意到數據庫維護和查詢操作是在關系數據庫管理系統和遙測點及計算點的實時更新的支持下執行，這就只能通過增加具有分散式常駐內存的實時子集的關系型數據庫來實現。
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