Other database objects

Oracle provides for easy and controlled privilege management through roles. Roles are named groups of related privileges that are granted to users or to other roles. They are designed to ease the administration of privileges in the database. Role characteristics Roles can be granted to and revoked from users with the same commands that are used to grant and revoke system privileges. Roles can be granted to any user or role. However, a role cannot be granted to itself and cannot be granted circularly. A role can consist of both system and object privileges.

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A sequence: Automatically generates unique numbers Is a sharable object Is typically used to create a primary key value Replaces application code Speeds up the efficiency of accessing sequence values when cached in memory

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Built-In Database Objects In addition to creating the database files, several other structures are created. Data dictionary: Contains descriptions of the objects in the database Dynamic performance tables: Contains information used by the database administrator (DBA) to monitor and tune the database and instance PL/SQL packages: Program units adding functionality to the database. These packages are created when the catproc.sql script is run after the CREATE DATABASE command. PL/SQL packages will not be discussed within the scope of this course.

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Workshop Methodology Group-Oriented and Interactive Structure The workshop is structured to allow individuals to work in groups to perform database backup, restore, and recovery operations. Each group is encouraged to share its approach to resolving database failures with other groups in the class. Intensive Hands-On Diagnosis and Problem Resolution The intent is to provide you with as much hands-on experience as possible to diagnose and work through backup and recovery scenarios.

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Once the SRS has been approved, implementation begins. Programming teams have many options: The programmers can simply start building the code and create the objects and user interface elements. Designers can build a user interface prototype to demonstrate to the users, stakeholders and the rest of the team. Any code used to develop the prototype is typically thrown away once the design has been finalized. Pictures, flow charts, data flow diagrams, database design diagrams and other visual tools can be used to determine aspects of the design and architecture.

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Introduction The DataSet is a disconnected, in-memory relational database that provides sophisticated navigational capabilities. It acts as a container for other objects including DataTable, DataColumn, DataRow, and DataRelation.

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My first experiments with object-oriented programming in PHP took place about six years ago. Unfortunately, the book that introduced me to the subject concentrated on the mechanics of writing classes and paid little heed to principles underlying OOP. As a result, I wrote classes that were closely intertwined with a specific project (“tightly coupled,” to use the OOP terminology). Everything worked exactly the way I wanted, but the design had a fundamental flaw: the classes couldn’t be used for any other project.

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You can find information about exporting data from Microsoft Access to various Web formats in Part 6, “Linking Access and the Web. ” This article provides details about exporting data to other Access databases and other file types. You can export (copy) any object in an Access database to any other Access database. You can also export data from Access tables to spreadsheet files, other databases, text files, Microsoft Word mail merge documents, and SQL tables.

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Oracle object technology is a layer of abstraction built on Oracle relational technology. New object types can be created from any built-in database types and any previously created object types, object references, and collection types. Metadata for user-defined types is stored in a schema that is available to SQL, PL/SQL, Java, and other published interfaces

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