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<TR CLASS="Informal" ALIGN="LEFT" VALIGN="TOP"><TD CLASS="Informal"><A NAME="970584"></A><P CLASS="TB"><EM CLASS="Italic">Italics</EM> </TD><TD CLASS="Informal"><A NAME="970586"></A><P CLASS="TB">Italic typeface indicates book titles or emphasis. </TD><TD CLASS="Informal"><A NAME="970591"></A><P CLASS="TB"><EM CLASS="Italic">Oracle9i Database Concepts</EM><A NAME="971125"></A><P CLASS="TB">Ensure that the recovery catalog and target database do <EM CLASS="Italic">not </EM>reside on the same disk. </TD></TR><TR CLASS="Informal" ALIGN="LEFT" VALIGN="TOP"><TD CLASS="Informal"><A NAME="970595"></A><P CLASS="TB"><CODE>UPPERCASE monospace (fixed-width) font</CODE> </TD><TD CLASS="Informal"><A NAME="970597"></A><P CLASS="TB">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. </TD><TD CLASS="Informal"><A NAME="970599"></A><P CLASS="TB">You can specify this clause only for a <CODE>NUMBER</CODE> column.<A NAME="970600"></A><P CLASS="TB">You can back up the database by using the <CODE>BACKUP</CODE> command.<A NAME="970601"></A><P CLASS="TB">Query the <CODE>TABLE_NAME</CODE> column in the <CODE>USER_TABLES</CODE> data dictionary view.<A NAME="970603"></A><P CLASS="TB">Use the <CODE>DBMS_STATS</CODE>.<CODE>GENERATE_STATS</CODE> procedure. </TD></TR><TR CLASS="Informal" ALIGN="LEFT" VALIGN="TOP"><TD CLASS="Informal"><A NAME="970605"></A><P CLASS="TB"><CODE>lowercase monospace (fixed-width) font</CODE> </TD><TD CLASS="Informal"><A NAME="970607"></A><P CLASS="TB">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.<A NAME="971101"></A><P CLASS="TB"><STRONG CLASS="Bold">Note: </STRONG>Some programmatic elements use a mixture of UPPERCASE and lowercase. Enter these elements as shown. </TD><TD CLASS="Informal"><A NAME="970609"></A><P CLASS="TB">Enter <CODE>sqlplus</CODE> to open SQL*Plus.<A NAME="970610"></A><P CLASS="TB">The password is specified in the <CODE>orapwd</CODE> file.<A NAME="971155"></A><P CLASS="TB">Back up the datafiles and control files in the <CODE>/disk1/oracle/dbs</CODE> directory.<A NAME="971102"></A><P CLASS="TB">The <CODE>department_id</CODE>, <CODE>department_name</CODE>, and <CODE>location_id</CODE> columns are in the <CODE>hr.departments</CODE> table.<A NAME="970611"></A><P CLASS="TB">Set the <CODE>QUERY_REWRITE_ENABLED</CODE> initialization parameter to <CODE>true.</CODE><A NAME="970612"></A><P CLASS="TB">Connect as <CODE>oe</CODE> user.<A NAME="971154"></A><P CLASS="TB">The <CODE>JRepUtil</CODE> class implements these methods. </TD></TR><TR CLASS="Informal" ALIGN="LEFT" VALIGN="TOP"><TD CLASS="Informal"><A NAME="971063"></A><P CLASS="TB"><EM><CODE>lowercase italic monospace (fixed-width) font</CODE></EM> </TD><TD CLASS="Informal"><A NAME="971065"></A><P CLASS="TB">Lowercase italic monospace font represents placeholders or variables. </TD><TD CLASS="Informal"><A NAME="971077"></A><P CLASS="TB">You can specify the <EM><CODE>parallel_clause</CODE></EM>.<A NAME="971078"></A><P CLASS="TB">Run <CODE>U</CODE><EM><CODE>old_release</CODE></EM><CODE>.SQL</CODE> where <EM><CODE>old_release</CODE></EM><EM CLASS="Italic"> </EM>refers to the release you installed prior to upgrading. </TD></TR></TABLE><TABLE CLASS="TableNote" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" dir="ltr"><TR CLASS="TableNote" ALIGN=LEFT VALIGN=TOP><TD CLASS="TableNote"></TD></TR></TABLE></A> <A NAME="970615"></A><H4 CLASS="SH1"><FONT FACE="Arial, Helvetica, sans-serif">Conventions in Code Examples</FONT></H4><A NAME="970616"></A><P CLASS="BP">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:</P> <PRE CLASS="CE"><A NAME="970617"></A>SELECT username FROM dba_users WHERE username = 'MIGRATE';<A NAME="970618"></A></PRE> <A NAME="970619"></A><P CLASS="BP">The following table describes typographic conventions used in code examples and provides examples of their use.</P> <A NAME="972303"><P><TABLE CLASS="InformalWide" BORDER="1" FRAME="HSIDES" RULES="GROUPS" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" dir="ltr"><THEAD><TR CLASS="Informal"><TH CLASS="Informal" align="left" valign="bottom" scope="col"><A NAME="972220"></A><FONT FACE="Arial, Helvetica, sans-serif"><STRONG><STRONG CLASS="Bold">Convention</STRONG></STRONG></FONT> </TH><TH CLASS="Informal" align="left" valign="bottom" scope="col"><A NAME="972222"></A><FONT FACE="Arial, Helvetica, sans-serif"><STRONG>Meaning</STRONG></FONT> </TH><TH CLASS="Informal" align="left" valign="bottom" scope="col"><A NAME="972224"></A><FONT FACE="Arial, Helvetica, sans-serif"><STRONG>Example</STRONG></FONT> </TH></TR><TBODY><TR CLASS="Informal" ALIGN="LEFT" VALIGN="TOP"><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972226"></A>[ ]</PRE> </TD><TD CLASS="Informal"><A NAME="972228"></A><P CLASS="TB">Brackets enclose one or more optional items. Do not enter the brackets. </TD><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972230"></A>DECIMAL (<EM CLASS="Italic">digits</EM> [ , <EM CLASS="Italic">precision</EM> ])</PRE> </TD></TR><TR CLASS="Informal" ALIGN="LEFT" VALIGN="TOP"><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972232"></A>{ }</PRE> </TD><TD CLASS="Informal"><A NAME="972234"></A><P CLASS="TB">Braces enclose two or more items, one of which is required. Do not enter the braces. </TD><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972236"></A>{ENABLE | DISABLE}</PRE> </TD></TR><TR CLASS="Informal" ALIGN="LEFT" VALIGN="TOP"><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972238"></A>|</PRE> </TD><TD CLASS="Informal"><A NAME="972240"></A><P CLASS="TB">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. </TD><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972242"></A>{ENABLE | DISABLE}<A NAME="972243"></A>[COMPRESS | NOCOMPRESS]</PRE> </TD></TR><TR CLASS="Informal" ALIGN="LEFT" VALIGN="TOP"><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972245"></A><CODE>...</CODE></PRE> </TD><TD CLASS="Informal"><A NAME="972247"></A><P CLASS="TB">Horizontal ellipsis points indicate either:<UL CLASS="TLB"><LI CLASS="TLB" TYPE="DISC"><A NAME="972248"></A>That we have omitted parts of the code that are not directly related to the example<P><LI CLASS="TLB" TYPE="DISC"><A NAME="972249"></A>That you can repeat a portion of the code<P></UL> </TD><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972251"></A><A NAME="972252"></A>CREATE TABLE ... AS <EM CLASS="Italic">subquery</EM>;<A NAME="972253"></A><A NAME="972254"></A>SELECT <EM CLASS="Italic">col1</EM>, <EM CLASS="Italic">col2</EM>, ... , <EM CLASS="Italic">coln</EM> FROM employees;</PRE> </TD></TR><TR CLASS="Informal" ALIGN="LEFT" VALIGN="TOP"><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972256"></A> .<A NAME="972257"></A> .<A NAME="972258"></A> .</PRE> </TD><TD CLASS="Informal"><A NAME="972260"></A><P CLASS="TB">Vertical ellipsis points indicate that we have omitted several lines of code not directly related to the example. </TD><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972262"></A>SQL> SELECT NAME FROM V$DATAFILE;<A NAME="972263"></A>NAME<A NAME="972264"></A>------------------------------------<A NAME="972265"></A>/fsl/dbs/tbs_01.dbf<A NAME="972266"></A>/fs1/dbs/tbs_02.dbf<A NAME="972267"></A>.<A NAME="972268"></A>.<A NAME="972269"></A>.<A NAME="972270"></A>/fsl/dbs/tbs_09.dbf<A NAME="972271"></A>9 rows selected.</PRE> </TD></TR><TR CLASS="Informal" ALIGN="LEFT" VALIGN="TOP"><TD CLASS="Informal"><A NAME="972273"></A><P CLASS="TB">Other notation </TD><TD CLASS="Informal"><A NAME="972275"></A><P CLASS="TB">You must enter symbols other than brackets, braces, vertical bars, and ellipsis points as shown. </TD><TD CLASS="Informal"> <PRE CLASS="TCI"><A NAME="972277"></A>acctbal NUMBER(11,2);<A NAME="972278"></A>acct CONSTANT NUMBER(4) := 3;</PRE> </TD></TR><TR CLASS="Informal" ALIGN="LEFT" VALIGN="TOP"><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972280"></A><EM CLASS="Italic">Italics</EM></PRE> </TD><TD CLASS="Informal"><A NAME="972282"></A><P CLASS="TB">Italicized text indicates placeholders or variables for which you must supply particular values. </TD><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972284"></A>CONNECT SYSTEM/<EM CLASS="Italic">system_password</EM><A NAME="972285"></A>DB_NAME = <EM CLASS="Italic">database_name</EM></PRE> </TD></TR><TR CLASS="Informal" ALIGN="LEFT" VALIGN="TOP"><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972287"></A>UPPERCASE</PRE> </TD><TD CLASS="Informal"><A NAME="972289"></A><P CLASS="TB">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. </TD><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972291"></A>SELECT last_name, employee_id FROM employees;<A NAME="972292"></A>SELECT * FROM USER_TABLES;<A NAME="972293"></A>DROP TABLE hr.employees;</PRE> </TD></TR><TR CLASS="Informal" ALIGN="LEFT" VALIGN="TOP"><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972295"></A><CODE>lowercase</CODE></PRE> </TD><TD CLASS="Informal"><A NAME="972297"></A><P CLASS="TB">Lowercase typeface indicates programmatic elements that you supply. For example, lowercase indicates names of tables, columns, or files.<A NAME="972298"></A><P CLASS="TB"><STRONG CLASS="Bold">Note: </STRONG>Some programmatic elements use a mixture of UPPERCASE and lowercase. Enter these elements as shown. </TD><TD CLASS="Informal"> <PRE CLASS="CEW"><A NAME="972300"></A>SELECT last_name, employee_id FROM employees;<A NAME="972301"></A>sqlplus hr/hr<A NAME="972302"></A>CREATE USER mjones IDENTIFIED BY ty3MU9;</PRE> </TD></TR></TABLE><TABLE CLASS="TableNote" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" dir="ltr"><TR CLASS="TableNote" ALIGN=LEFT VALIGN=TOP><TD CLASS="TableNote"></TD></TR></TABLE></A> <A NAME="972311"></A><H2 CLASS="PH"><FONT FACE="Arial, Helvetica, sans-serif">Documentation Accessibility</FONT></H2><A NAME="971606"></A><P CLASS="BP">Our goal is to make Oracle products, services, and supporting documentation accessible, with good usability, to the disabled 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 continue to evolve over time, and Oracle Corporation is actively engaged with other market-leading technology vendors to address technical obstacles so that our documentation can be accessible to all of our customers. For additional information, visit the Oracle Accessibility Program Web site at</P> <PRE CLASS="CE"><A NAME="971330"></A><A HREF="http://www.oracle.com/accessibility/">http://www.oracle.com/accessibility/</a><A NAME="971351"></A></PRE> <A NAME="971477"></A><H5 CLASS="SH3"><FONT FACE="Arial, Helvetica, sans-serif">Accessibility of Code Examples in Documentation</FONT></H5><A NAME="971782"></A><P CLASS="BP">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 otherwise empty line; however, JAWS may not always read a line of text that consists solely of a bracket or brace.</P><!-- Start Footer --></DIV><DIV CLASS="OUTD"><HR><TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%"><TR><TD VALIGN="BOTTOM" WIDTH="33%"><TABLE CELLSPACING="0" CELLPADDING="0"><TR><TD ALIGN="CENTER"><A HREF="rcf.htm"><IMG SRC="larrow.gif" ALT="Go to previous page" BORDER="0" HEIGHT="30" WIDTH="40"></A></TD><TD ALIGN="CENTER"><A HREF="lnoci.htm"><IMG SRC="rarrow.gif" ALT="Go to next page" BORDER="0" HEIGHT="30" WIDTH="40"></A></TD> </TR></TABLE></TD><TD ALIGN="CENTER" WIDTH="34%"><font size="-2">Copyright © 2002 Oracle Corporation.</font><BR><FONT SIZE="-2">All Rights Reserved.</FONT></TD><TD VALIGN="BOTTOM" ALIGN="RIGHT" WIDTH="33%"> <TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="144"><TR><TD ALIGN="CENTER" VALIGN="TOP" WIDTH="25%"><A HREF="toc.htm"><IMG SRC="conticon.gif" ALT="Go To Table Of Contents" BORDER="0" HEIGHT="30"WIDTH="30"><BR><FONT SIZE="-2">Contents</FONT></A></TD><TD ALIGN="CENTER" VALIGN="TOP" WIDTH="25%"><A HREF="index.htm"><IMG SRC="indxicon.gif" ALT="Go To Index" BORDER="0" HEIGHT="30"WIDTH="30"><BR><FONT SIZE="-2">Index</FONT></A></TD></TR></TABLE></TD></TR></TABLE> </DIV></BODY></HTML>⌨️ 快捷键说明
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