Database design for smarties : using UML for data modeling by Robert J. Muller

By Robert J. Muller

Whether construction a relational, object-relational, or object-oriented database, database builders are more and more counting on an object-oriented layout strategy because the most sensible option to meet person wishes and function standards. This e-book teaches you the way to take advantage of the Unified Modeling Language-the legit commonplace of the item administration Group-to strengthen and enforce the absolute best layout to your database.

Inside, the writer leads you step-by-step during the layout strategy, from necessities research to schema new release. you will discover ways to exhibit stakeholder wishes in UML use instances and actor diagrams, to translate UML entities into database parts, and to remodel the ensuing layout into relational, object-relational, and object-oriented schemas for all significant DBMS items.

* Teaches you every little thing you want to comprehend to layout, construct, and try out databases utilizing an OO model.
* indicates you ways to exploit UML, the permitted ordinary for database layout in response to OO principles.
* Explains tips to rework your layout right into a conceptual schema for relational, object-relational, and object-oriented DBMSs.
* bargains sensible examples of layout for Oracle, SQL Server, Sybase, Informix, item layout, POET, and different database administration systems.
* Focuses seriously on re-using layout styles for max productiveness and teaches you the way to certify accomplished designs for re-use.

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Even the query language retrieves collections of objects that you must then iterate through. Also, most OODBMS products started out with no query language, and there is still not all that much interest in querying (as opposed to navigating) in the OODBMS application community. Operations The ODMG standard adopts the OMG CORBA standard for operations and supports overloading of operations. You overload an operation when you create an operation in a class with the same name and signature (combination of parameter types) as an operation in another class.

Oracle8 contains record data types as the primary way of declaring the structure of objects in the system. The CREATE TYPE AS OBJECT statement lets you define the attributes and methods of the type. DB2 has no concept of record type. Informix Dynamic Server offers the row type for defining the attributes (CREATE ROW TYPE with a syntax similar to CREATE TABLE), but no methods. You can, however, create user-defined routines that take objects of any type and act as methods. To a certain extent, this means that Oracle8 object types resemble the encapsulated types in the next section, except for your being able to access all the data attributes of the object directly.

Infuriating, because Date and Darwen bring a caustic and arrogant sense of British humour to the book, which trashes virtually every aspect of the OR world. Illuminating, because they work through some serious problems with OR "theory," if you can call it that, from a relational instead of 00 perspective. Aggravating, because there is very little chance of the ORDBMS vendors learning anything from the book, to their and our loss. I do not present the detailed manifesto here because I don't believe the system they demand delivers the benefits of object-oriented integration with relational technology and because I seriously doubt that system will ever become a working ORDBMS.

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Database design for smarties : using UML for data modeling by Robert J. Muller
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