Preface

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Conventions

This section describes t he conventions used in the text and code examples of this documentation set. It describes:

• Conventions in Text
• Conventions in Code Examples
• Conventions for Windows Operating Systems

Conventions in Text

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.

Conventions in Code Examples< /h4>

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 en ter the brackets.	DECIMAL (digits [ , precision ])
{ }	Braces enclose two or more item s, one of which is required. Do not enter the braces.	{ENABLE | DISABLE}
|	A vertical bar represents a choice of two or more options w ithin brackets or braces. Enter one of the options. Do not enter the vertical bar.	{ENABLE | DISABLE} [COMPRESS | NOCOMPRESS]
...	< /a> Horizontal ellipsis points indicate either: T hat we have omitted parts of the code that are not directly related to the example That you can repeat a portion of the code	CREATE TABLE ... AS subquery; SELECT col1, col2, ... , coln FROM employees;
. . .	Vertical ellipsis points indicate that we have omitted sever al lines of code not directly related to the example.	SQL> SE LECT 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 varia bles 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 th e 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 ty peface 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 lowerca se. Enter these elements as shown.	SELECT last_name, employee_id FROM employees; sqlplus hr/hr CREATE USER mjones IDENTIFIED BY ty3MU9;

Conventions for Windows Operating Syst ems

The following table describes conventions for Windows operating systems and prov ides examples of their use.

c:\winnt"\"system32 is the same as 
C:\WINNT\SYSTEM32

C:\oracle\oradata>

C:\&
gt;exp scott/tiger TABLES=emp QUERY=\"WHERE 
job='SALESMAN' and sal<1600\"
C:\>imp SYSTEM/password FROMUSER=scott 
TABLES=(emp, dept)

HOME_NAME

C:\> net start Ora
cleHOME_NAMETNSListener

Documentation Accessibility

Our goal is to make Oracle products, services, and supporting documentation accessible, with good usability, to the di sabled community. To that end, our documentation includes features that make information available to users of assistive technology. This documentation is available in HTML format, and contains markup to facilitate access by the disabled community. Standards will co ntinue to evolve over time, and Oracle is actively engaged with other market-leading technology vendors to address technical obstacle s so that our documentation can be accessible to all of our customers. For additional information, visit the Oracle Accessibility Pro gram Web site at

http://www.oracle.com/access
ibility/

Accessibil ity of Code Examples in Documentation

JAWS, a Windows screen reader, may not always correctly read the code examples in this document. The conventions for writing code require that closing braces should appear on an o therwise empty line; however, JAWS may not always read a line of text that consists solely of a bracket or brace.

Accessibility of Links to External Web Sites in Documentation

This documentation may contain links to Web sites of other companies or organizations tha t Oracle does not own or control. Oracle neither evaluates nor makes any representations regarding the accessibility of these Web sit es.