Oracle® Database Application Developer's Guide - Object-Relational Features 10g Release 1 (10.1) Part Number B10799-01 |
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Oracle Database Application Developer's Guide - Object-Relational Features describes how to use the object-relational features of the Oracle Server, 10g Release 1 (10.1). Information in this guide applies to versions of the Oracle Server that run on all platforms, and does not include system-specific information.
This preface contains these topics:
Oracle Database Application Developer's Guide - Object-Relational Features is intended for programmers developing new applications or converting existing applications to run in the Oracle environment. The object-relational features are often used in content management, data warehousing, data/information integration, and similar applications that deal with complex structured data. The object views feature can be valuable when writing new C++, Java, or XML applications on top of an existing relational schema.
This guide assumes that you have a working knowledge of application programming and that you are familiar with the use of Structured Query Language (SQL) to access information in relational database systems.
This document contains:
Introduces the key features and explains the advantages of the object-relational model.
Explains the basic concepts and terminology that you need to work with Oracle Objects.
Discusses collection datatypes and operations on collection datatypes.
Summarizes the object-relational features in SQL and PL/SQL; Oracle Call Interface (OCI); Pro*C/C++; Oracle Objects For OLE; and Java, JDBC, and Oracle SQLJ. The information in this chapter is high-level, for education and planning. The following chapters explain how to use the object-relational features in greater detail.
Explains object views, which allow you to develop object-oriented applications without changing the underlying relational schema.
Explains how to perform essential operations with objects and object types.
Discusses features that you might need to manage storage and performance as you scale up an object-oriented application.
Explains the implementation and performance characteristics of the Oracle object-relational model.
Demonstrates how a relational program can be rewritten as an object-oriented one, schema and all.
For more information, see these Oracle resources:
PL/SQL User's Guide and Reference for information on PL/SQL, the procedural language extension to Oracle SQL
Oracle Database Application Developer's Guide - Fundamentals for general information about developing applications
Oracle XML DB Developer's Guide and Oracle XML Developer's Kit Programmer's Guide for information about developing applications with XML
Oracle Database JDBC Developer's Guide and Reference and Oracle Database Java Developer's Guide to use Oracle object-relational features through Java
Oracle Call Interface Programmer's Guide and Oracle C++ Call Interface Programmer's Guide for information on using the Oracle Call Interface (OCI) and Oracle C++ Call Interface to build third-generation language (3GL) applications that access the Oracle Server
Pro*C/C++ Programmer's Guide for information on Oracle's Pro* series of precompilers, which allow you to embed SQL and PL/SQL in 3GL application programs written in Ada, C, C++, COBOL, or FORTRAN
Oracle Database SQL Reference and Oracle Database Administrator's Guide for information on SQL
Oracle Database Concepts for information on basic Oracle concepts
Many of the books in the documentation set use the sample schemas of the seed database, which is installed by default when you install Oracle. Refer to Oracle Database Sample Schemas for information on how these schemas were created and how you can use them yourself.
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This section describes the conventions used in the text and code examples of this documentation set. It describes:
We use various conventions in text to help you more quickly identify special terms. The following table describes those conventions and provides examples of their use.
Convention | Meaning | Example |
---|---|---|
Bold | Bold typeface indicates terms that are defined in the text or terms that appear in a glossary, or both. | When you specify this clause, you create an index-organized table. |
Italics | Italic typeface indicates book titles or emphasis. | Oracle Database Concepts
Ensure that the recovery catalog and target database do not reside on the same disk. |
UPPERCASE monospace (fixed-width) font |
Uppercase monospace typeface indicates elements supplied by the system. Such elements include parameters, privileges, datatypes, RMAN keywords, SQL keywords, SQL*Plus or utility commands, packages and methods, as well as system-supplied column names, database objects and structures, usernames, and roles. | You can specify this clause only for a NUMBER column.
You can back up the database by using the Query the Use the |
lowercase monospace (fixed-width) font |
Lowercase monospace typeface indicates executables, filenames, directory names, and sample user-supplied elements. Such elements include computer and database names, net service names, and connect identifiers, as well as user-supplied database objects and structures, column names, packages and classes, usernames and roles, program units, and parameter values.
Note: Some programmatic elements use a mixture of UPPERCASE and lowercase. Enter these elements as shown. |
Enter sqlplus to open SQL*Plus.
The password is specified in the Back up the datafiles and control files in the The Set the Connect as The |
lowercase italic monospace (fixed-width) font |
Lowercase italic monospace font represents placeholders or variables. | You can specify the parallel_clause .
Run |
Code examples illustrate SQL, PL/SQL, SQL*Plus, or other command-line statements. They are displayed in a monospace (fixed-width) font and separated from normal text as shown in this example:
SELECT username FROM DBA_USERS WHERE username = 'MIGRATE';
The following table describes typographic conventions used in code examples and provides examples of their use.
Convention | Meaning | Example |
---|---|---|
[ ] |
Brackets enclose one or more optional items. Do not enter the brackets. |
DECIMAL (digits [ , precision ]) |
{ } |
Braces enclose two or more items, one of which is required. Do not enter the braces. |
{ENABLE | DISABLE} |
| |
A vertical bar represents a choice of two or more options within brackets or braces. Enter one of the options. Do not enter the vertical bar. |
{ENABLE | DISABLE} [COMPRESS | NOCOMPRESS] |
... |
Horizontal ellipsis points indicate either:
|
CREATE TABLE ... AS subquery; SELECT col1, col2, ... , coln FROM employees; |
. . . |
Vertical ellipsis points indicate that we have omitted several lines of code not directly related to the example. |
SQL> SELECT NAME FROM V$DATAFILE; NAME --------------------------------- /fsl/dbs/tbs_01.dbf /fs1/dbs/tbs_02.dbf . . . /fsl/dbs/tbs_09.dbf 9 rows selected. |
Other notation | You must enter symbols other than brackets, braces, vertical bars, and ellipsis points as shown. |
acctbal NUMBER(11,2); acct CONSTANT NUMBER(4) := 3; |
Italics |
Italicized text indicates placeholders or variables for which you must supply particular values. |
CONNECT SYSTEM/system_password DB_NAME = database_name |
UPPERCASE |
Uppercase typeface indicates elements supplied by the system. We show these terms in uppercase in order to distinguish them from terms you define. Unless terms appear in brackets, enter them in the order and with the spelling shown. However, because these terms are not case sensitive, you can enter them in lowercase. |
SELECT last_name, employee_id FROM employees; SELECT * FROM USER_TABLES; DROP TABLE hr.employees; |
lowercase |
Lowercase typeface indicates programmatic elements that you supply. For example, lowercase indicates names of tables, columns, or files.
Note: Some programmatic elements use a mixture of UPPERCASE and lowercase. Enter these elements as shown. |
SELECT last_name, employee_id FROM employees; sqlplus hr/hr CREATE USER mjones IDENTIFIED BY ty3MU9; |
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