database query 中文意思是什麼
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This thesis firstly introduces the defference between edi and the communication of information based on xml, and puts forword a kind of interface of communication of information between enterprises based on xml. secondly analyses the applications of xml in the communication of information between enterprises, database query and the different database ' s interface. thirdly introduse cii based on xml. afterword some key problem for the communication of information based on xml. after that, a query of productions ' informations system based on xml is bringed up. the author completes the design and the running of this system
並重點對基於xml的異種數據庫通信、數據庫查詢、異種數據源合併技術進行了深入的研究。在此基礎上完成了基於xml的產品信息管理原型系統的設計與開發。實踐證明本文提出的基於xml的企業信息集成框架的基本框架和實現技術是可行的、有效的。 -
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。 -
We first present a number of desiderata for an xml - based query language, and based on this criterion, we introduce the syntax of a simple core ian - guage for semistructured data and then describe four extensions that have resulted in working prototypes. second, we present the algorithm for computing the result of a regular expression on data graph with cycles, the first - order interpretation of querying language for semistructured data, and explore structural recursion and bisimulation in semistructured data and propose an efficient and systematic way to computing a bisimulation between the two graphs. we also proposed and implemented a web querying system with database features
基於這些準則，對一個簡單的半結構數據查詢核心語言的語法提出了兩方面擴充；給出了計算數據圖中正規表達式的演算法；對半結構數據查詢語言的一階邏輯描述、結構遞歸和數據圖的雙態模擬（ bisimulation ）等問題進行了研究，提出了一種判定數據圖的bisimulation演算法；在xml數據查詢語言研究的基礎上，設計並實現了一種具有數據庫查詢特性的web查詢系統原型。 -
In this paper, a safe, reliable, and intellectual control plan is provided aiming at the heat charge for dwelling district, which contains epigynous machine responsible for data processing and hypogynous mahcine responsible for unlocking the valve, by means of serial communication between them, combining homemade three - channel valve, to adminstrate the charge data and the valve efficiently. the main idea is based on the homemade three - channel valve. the vavle is locked at peacetime, while it is opened with the help of open tool and a water flow in the caliduct. as soon as the flow stops, the valve locks automatically. the open tool has data in its memory, and implement function by lcd and keyborad. so it can identify data and drive motor, to open the valve intellectually. the epigynous machine database manage system administrator the dweller information, standard heat charge and payment infomation etc, including store, configure, query, print etc, then store in the memory of open tool. as a result, the plan can do well in the experiment
此閥平時是鎖閉的，只有用開啟器配以暖氣片中的水流才可打開，一旦水流斷開，則此閥會自會鎖閉。而開啟器則是根據其存儲器中的數據配以液晶顯示及小鍵盤，完成數據確認及電機驅動，自動對相應用戶的三通閥打開特定角度，完成開啟任務。上位機數據庫管理系統完成對用戶信息、熱費標準、繳費信息等原始數據的常規管理，包括存儲、設置、查詢、列印等，最後將處理后的數據傳到開啟器中存儲。 -
Based on the superiority of distributed database in highway project management, its distributed database is developed in the paper, including solution of data division and redundancy, design of intercurrent mechanism, system structure design and query disposal
摘要在分析分散式數據庫對公路建設項目管理的優越特性基礎上，提出了公路建設項目管理的分佈數據庫，其中包括數據分割和冗餘問題的解決、並發控制機制設計、系統結構設計和查詢處理。 -
A database query syntax error has occurred
發生了一個數據庫查詢語法錯誤。 -
Sets the schema of the design table for which the database query method will be generated
設置將為其生成數據庫查詢方法的設計表的架構。 -
It provides users a unique interface, accept the query terms, run and return the results like meta - search engine do. in this paper we have developed a wan search database query system for practice use, and this project is supported by national funds
廣域網數據庫查詢系統提供用戶關于某一類數據庫信息的統一的查詢界面，它調用各個獨立網站數據庫系統對用戶輸入的查詢條件進行實時並發查詢，同時合併查詢結果返回給用戶。 -
2. the design of database query optimization
2 .在數據庫的查詢優化設計方面。 -
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。 -
If you do not, processor time will be wasted loading view state into the server control that will only be overridden by the database query
如果不這樣做，處理器時間將浪費在將視圖狀態加載到服務器控制項上，而這些狀態只是由數據庫查詢重寫。 -
Using nlu technology in the database query system and designing nlqid ( natural language query interface of database ) has become one of the most hopeful applied fields in the research on nlu
在數據庫查詢系統中應用自然語言理解技術，設計數據庫自然語言查詢介面，已成為自然語言研究中最具有廣泛應用前景的方向之一。 -
Furthermore, domain knowledge database and document database are introduced in our method. through the friendly gui and classified domain, users can carry out accurate queries based on semantics in the document database, query and manage lots of documents semantically, thus work efficiency are improved largely
另外，該方法採用了領域知識庫與文檔庫相結合的辦法，通過圖形用戶介面，用戶可以按領域，根據自己感興趣的信息，對文檔庫數據進行查詢；也可以對大量word文檔進行精確的基於語義的查詢和管理，大大提高工作效率。 -
Here is an example showing how to use the time utility to measure the response time of a simple database query
下面的實例展示了如何使用time實用程序來測量一個簡單數據庫查詢的響應時間： -
You can use the time utility to report the response time of system operations such as file transfer, database query execution, and other activities
您可以使用time實用程序來報告一些系統操作的響應時間，例如文件傳送、數據庫的查詢執行以及其他活動。 -
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。 -
If you need to wait on a blocking action - say, the results from a remote database query - it is not clear exactly how long you will need to wait for results to be available
如果您需要等待一個阻塞操作比如，對于來自遠程數據庫查詢的結果您不會確切地知道在可以使用結果之前究竟要等待多長時間。 -
On the aspect of data index, the essential of spatial index was advanced based on database, and a spatial index method called the spatial grid index method was put forward based on two phases database query
在數據索引方面，提出了基於數據庫的空間索引的實質，對基於數據庫的空間索引作了一定的研究，提出了基於數據庫的sql兩階段查詢的空間網格索引機制。 -
In the database server construction, we emphasized on how to create new user database and its objects using sql server 7. 0 and transact - sql. we also introduced the measures adopted to ensure the safety of the database ; in the design of application software, we discussed how to realize the two modules of query and management of database using c + + builer. by the comparison of a few kinds of datasets in c + + builer, we got a deeper understanding of the principle of database query ; on closing this paper, we elaborated on the bde and odbc, and made efficient improvement on system function and executed helpful maintenance with the tools of sql server manager
在數據庫的創建中，本文著重論述了如何使用sqlserver7 . 0以及transact - sql結構化查詢語言在服務器端創建用戶數據庫及數據庫對象，並且介紹了在用戶數據庫中採取的安全性措施；在客戶端數據庫應用程序的設計中，按照設計的思路論述了如何用c + + builder編程語言實現數據庫查詢和管理兩大模塊，並通過對幾種數據集組件的比較從更深的層面研究了數據庫查詢的實現；最後，本文深入闡述了c + + builder的數據庫引擎（ bde ）和開放式數據庫連接（ odbc ） 。 -
This is where you ll find sql, the well - known and dominant database query language standard, as well as xquery
這里可以看到眾所周知的主流數據庫查詢語言標準sql ，以及xquery 。
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