On the one hand, vendors of popular relational database management systems (DBMS), such as IBM, Informix and Oracle, extend their products with new capabilities, including support for non-traditional data types (text, graphics, sound, video, spatial data, etc.) and for object-oriented concepts...
In this paper, we propose an approach and basic constructs to realize a fuzzy database processing capability on an Object-Oriented Database (OODB) system. The proposed approach can manage several types of uncertainties: (1) uncertain objects, (2) uncertain relationships between instance objects, (...
A significant portion of the XML community views XML as naturally object-oriented (for example, every node in an XML document has unique identity, as do objects in all object-oriented systems). Consequently, when XML became a significant market force, we expected that Object Data Management Grou...
In objected-oriented and object-relational databases, users can define operations on data as part of the database definitions. Anoperation(also called a function) is specified in two parts. Theinterface(or signature) of an operation includes the operation name and the data type of its arguments ...
Log files should never be put on compressed file systems. ' filestream_path ' For a FILESTREAM filegroup, FILENAME refers to a path where FILESTREAM data will be stored. The path up to the last folder must exist, and the last folder must not exist. For example, if you...
Your procedural ambitions will bear no fruit and you’ll have to pry that logic from my dead, cold object-oriented hands . . . I want a single layer of cleverness: My domain model. 这种对DBMS的不信任导致了Rails应用程序中的许多问题。使用orm编写的应用程序通常非常慢——orm本身在优化生成查询...
Database Object Naming Rules Every database object has a name. In a SQL statement, you represent the name of an object with aquoted identifieror anonquoted identifier. A quoted identifier begins and ends with double quotation marks ("). If you name a schema object using a quoted identifier...
Data files should not be put on compressed file systems unless the files are read-only secondary files, or the database is read-only. Log files should never be put on compressed file systems. 'filestream_path' For a FILESTREAM filegroup, FILENAME refers to a path where FILESTREAM data will...
This paper addresses the problem of understanding the current set of commercially available object-oriented database systems. It proposes a classification of these systems based on their external behavior and on the target customers they are aimed at. Th
Databasesystemsoffersolutionstoalltheaboveproblems DataModels AcollectionoftoolsfordescribingDataDatarelationshipsDatasemanticsDataconstraints RelationalmodelEntity-Relationshipdatamodel(mainlyfordatabasedesign)Object-baseddatamodels(Object-orientedandObject-relational)Semistructureddatamodel(XML)Otheroldermodels:Networkmodel...