270 lines
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270 lines
15 KiB
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="dc.language" scheme="rfc1766" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<meta name="dc.date" scheme="iso8601" content="2005-09-19" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<title>How to use this book</title>
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<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
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<link rel="stylesheet" type="text/css" href="ic.css" />
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</head>
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<body>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
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<a name="howtouse"></a>
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<h2 id="howtouse"><a href="rbafzmst02.htm#ToC_5">How to use this book</a></h2>
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<p>This book defines the DB2® UDB SQL language elements for DB2 UDB for iSeries.</p>
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<a name="sqlrassume"></a>
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<h3 id="sqlrassume"><a href="rbafzmst02.htm#ToC_6">Assumptions relating to examples of SQL statements</a></h3>
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<p>The examples of SQL statements shown in this guide assume the following:</p>
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<ul>
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<li>SQL keywords are highlighted.</li>
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<li>Table names used in the examples are the sample tables provided in Appendix
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A of the <a href="../sqlp/rbafykickoff.htm">SQL Programming</a> book. Table names that are
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not provided in that appendix should use schemas that you create. You can
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create a set of sample tables in your own schema by issuing the following
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SQL statement:
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<pre class="xmp"><span class="bold">CALL</span> QSYS.CREATE_SQL_SAMPLE ('your-schema-name')</pre></li>
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<li>The SQL naming convention is used.</li>
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<li>For COBOL examples, the APOST and APOSTSQL precompiler options are assumed
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(although they are not the default in COBOL). Character-string constants within
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SQL and host language statements are delimited by apostrophes (').</li>
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<li>A sort sequence of *HEX is used.</li></ul><p class="indatacontent">Whenever the examples vary from these assumptions, it is stated.</p>
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<p>See also <a href="rbafzmsthowtous.htm#sqlrcodedis">Code disclaimer information</a>.</p>
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<a name="sqlrcodedis"></a>
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<h4 id="sqlrcodedis">Code disclaimer information</h4>
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<p>This document contains programming examples.</p>
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<p>IBM® grants you a nonexclusive copyright license to use all programming
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code examples from which you can generate similar function tailored to your
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own specific needs.</p>
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<p>All sample code is provided by IBM for illustrative purposes only. These
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examples have not been thoroughly tested under all conditions. IBM, therefore,
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cannot guarantee or imply reliability, serviceability, or function of these
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programs.</p>
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<p>All programs contained herein are provided to you "AS IS" without any warranties
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of any kind. The implied warranties of non-infringement, merchantability and
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fitness for a particular purpose are expressly disclaimed.</p>
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<a name="sqlrsyntax"></a>
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<h3 id="sqlrsyntax"><a href="rbafzmst02.htm#ToC_8">How to read the syntax diagrams</a></h3>
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<p>The following rules apply to the syntax diagrams used in this book: </p>
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<ul>
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<li>Read the syntax diagrams from left to right, from top to bottom, following
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the path of the line.
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<p>The >>--- symbol indicates
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the beginning of a statement.</p>
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<p>The ---> symbol indicates
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that the statement syntax is continued on the next line.</p>
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<p>The >---
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symbol indicates that a statement is continued from the previous line.</p>
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<p>The --->< symbol indicates the end of a statement.</p>
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<p>Diagrams of syntactical units other than complete statements start
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with the |--- symbol and end with the ---| symbol.</p></li>
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<li>Required items appear on the horizontal line (the main path).
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn2.htm"
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border="0" /></span><a href="#skipsyn-1"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a>>>-<span class="italic">required_item</span>-----------------------------------------------><
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</pre>
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<a name="skipsyn-1" id="skipsyn-1"></a></li>
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<li>Optional items appear below the main path.
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn3.htm"
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border="0" /></span><a href="#skipsyn-2"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a>>>-<span class="italic">required_item</span>--+---------------+----------------------------><
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'-<span class="italic">optional_item</span>-'
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</pre>
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<a name="skipsyn-2" id="skipsyn-2"></a>
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<p>If an item appears above the main path, that item is optional,
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and has no effect on the execution of the statement and is used only for readability.
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</p>
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn4.htm"
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border="0" /></span><a href="#skipsyn-3"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a> .-<span class="italic">optional_item</span>-.
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>>-<span class="italic">required_item</span>--+---------------+----------------------------><
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</pre>
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<a name="skipsyn-3" id="skipsyn-3"></a></li>
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<li>If more than one item can be chosen, they appear vertically, in a stack.
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<p>If one of the items must be chosen, one item of the stack appears on the main
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path.
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</p>
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn5.htm"
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border="0" /></span><a href="#skipsyn-4"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a>>>-<span class="italic">required_item</span>--+-<span class="italic">required_choice</span>-+--------------------------><
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'-<span class="italic">required_choice</span>-'
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</pre>
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<a name="skipsyn-4" id="skipsyn-4"></a>
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<p>If choosing one of the items is optional, the entire stack
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appears below the main path.
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</p>
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn6.htm"
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border="0" /></span><a href="#skipsyn-5"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a>>>-<span class="italic">required_item</span>--+-----------------+--------------------------><
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+-<span class="italic">optional_choice</span>-+
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'-<span class="italic">optional_choice</span>-'
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</pre>
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<a name="skipsyn-5" id="skipsyn-5"></a>
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<p>If one of the items is the default, it will appear above
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the main path and the remaining choices will be shown below.
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</p>
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn7.htm"
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border="0" /></span><a href="#skipsyn-6"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a> .-<span class="italic">default_choice</span>--.
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>>-<span class="italic">required_item</span>--+-----------------+--------------------------><
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+-<span class="italic">optional_choice</span>-+
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'-<span class="italic">optional_choice</span>-'
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</pre>
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<a name="skipsyn-6" id="skipsyn-6"></a>
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<p>If an optional item has a default when it is not
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specified, the default appears above the main path.
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</p>
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn8.htm"
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border="0" /></span><a href="#skipsyn-7"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a>>>-<span class="italic">required_item</span>--+--------------------------------------+-----><
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| .-<span class="italic">default_choice</span>--. |
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+-<span class="italic">optional_choice</span>--+-<span class="italic">required_choice</span>-+-+
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| '-<span class="italic">required_choice</span>-' |
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'-<span class="italic">optional_choice</span>----------------------'
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</pre>
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<a name="skipsyn-7" id="skipsyn-7"></a></li>
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<li>An arrow returning to the left, above the main line, indicates an item
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that can be repeated.
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn9.htm"
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border="0" /></span><a href="#skipsyn-8"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a> .-----------------.
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V |
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>>-<span class="italic">required_item</span>----<span class="italic">repeatable_item</span>-+--------------------------><
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</pre>
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<a name="skipsyn-8" id="skipsyn-8"></a>
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<p>If the repeat arrow contains a comma, you must separate repeated
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items with a comma.
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</p>
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn10.htm"
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border="0" /></span><a href="#skipsyn-9"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a> .-,---------------.
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V |
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>>-<span class="italic">required_item</span>----<span class="italic">repeatable_item</span>-+--------------------------><
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</pre>
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<a name="skipsyn-9" id="skipsyn-9"></a>
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<p>A repeat arrow above a stack indicates that you can repeat
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the items in the stack.</p></li>
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<li>Keywords appear in uppercase (for example, <tt class="xph">FROM</tt>). They must
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be spelled exactly as shown. Variables appear in all lowercase letters (for
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example, <var class="pv">column-name</var>). They represent user-supplied names or values.</li>
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<li>If punctuation marks, parentheses, arithmetic operators, or other such
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symbols are shown, you must enter them as part of the syntax.</li>
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<li>The syntax diagrams only contain the preferred or standard keywords. If
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non-standard synonyms are supported in addition to the standard keywords,
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they are described the <span class="bold">Notes</span> sections instead of the
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syntax diagrams. For maximum portability, only the preferred or standard keywords
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should be used.</li>
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<li>Sometimes a single variable represents a larger fragment of the syntax.
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For example, in the following diagram, the variable <tt class="xph">parameter-block</tt> represents
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the whole syntax fragment that is labeled <span class="bold">parameter-block</span>:
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn11.htm"
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border="0" /></span><a href="#skipsyn-10"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a>>>-<span class="italic">required_item</span>--| parameter-block |--------------------------><
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parameter-block:
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|--+-<span class="italic">parameter1</span>-----------------+-------------------------------|
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'-<span class="italic">parameter2</span>--+-<span class="italic">parameter3</span>-+-'
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'-<span class="italic">parameter4</span>-'
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</pre>
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<a name="skipsyn-10" id="skipsyn-10"></a></li></ul>
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<a name="wq2"></a>
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<h3 id="wq2"><a href="rbafzmst02.htm#ToC_9">Conventions used in this book</a></h3>
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<p>This section specifies some conventions which are used throughout this
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manual.</p>
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<a name="wq3"></a>
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<h4 id="wq3">Highlighting conventions</h4>
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<p>The following conventions are used in this book.</p>
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<a name="wq4"></a>
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<table id="wq4" width="100%" summary="" border="1" frame="hsides" rules="rows">
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<tbody valign="top">
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<tr>
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<td width="16%"><span class="bold">Bold</span></td>
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<td width="83%">Indicates SQL keywords used in examples and when introducing descriptions
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involving the keyword.</td>
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</tr>
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<tr>
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<td><span class="italic">Italics</span></td>
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<td>Indicates one of the following:
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<ul>
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<li>Variables that represent items from a syntax diagram.</li>
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<li>The introduction of a new term.</li>
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<li>A reference to another source of information.</li></ul></td>
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</tr>
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</tbody>
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</table>
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<a name="sqlrmixedata"></a>
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<h4 id="sqlrmixedata">Conventions for describing mixed data values</h4>
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<p>When mixed data values are shown in the examples, the following conventions
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apply:</p>
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<div class="mmobj">
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<img src="rv2w926.gif" alt="Conventions for describing mixed data values. Shift-out character represented by X' 0E', shift-in characters represented by X' 0F', single-byte characters represented by sbcs-string, double-byte characters represented by dbcs-string, DBCS apostrophe represented by EBCDIC X' 427D, and DBCS G represented by EBCDIC X' 42C7." /></div>
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<a name="accessibility"></a>
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<h3 id="accessibility"><a href="rbafzmst02.htm#ToC_12">SQL accessibility</a></h3>
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<p>IBM is committed to providing interfaces and documentation that are easily
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accessible to the disabled community. For general information on IBM's Accessibility
|
||
|
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support visit the <a href="http://www.ibm.com/able">Accessibility Center</a> at
|
||
|
|
http://www.ibm.com/able.
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<img src="www.gif" alt="Link outside of Information Center" /></p>
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<p>SQL accessibility support falls in two main categories.</p>
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<ul>
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<li>iSeries™ Navigator is graphical user interface to iSeries and DB2 UDB. For information
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about the Accessibility features supported in Windows® graphical user interfaces, see
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Accessibility in the Windows Help Index.</li>
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<li>Online documentation, online help, and prompted SQL interfaces can be
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accessed by a Windows Reader program such as the IBM Home Page Reader.
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|
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For information on the IBM Home Page Reader and other tools, visit the <a href="http://www.ibm.com/able">Accessibility Center</a>
|
||
|
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<img src="www.gif" alt="Link outside of Information Center" />.</li></ul>
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||
|
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<p>The IBM Home Page Reader can be used to access all descriptive text in this
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book, all articles in the SQL Information Center, and all SQL messages. Due
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to the complex nature of SQL syntax diagrams, however, the reader will skip
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syntax diagrams. Two alternatives are provided for better ease of use:</p>
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<ul>
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<li>Interactive SQL and Query Manager
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<p>Interactive SQL and Query Manager
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are traditional file interfaces that provide prompting for SQL statements.
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These are part of the DB2 UDB Query Manager and SQL Development Kit. For more
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information about Interactive SQL and Query Manager, see the <a href="../sqlp/rbafykickoff.htm">SQL Programming</a> and <a href="../books/sc415212.pdf">Query Manager Use</a>
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<img src="wbpdf.gif" alt="Link to PDF" />books.</p></li>
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<li>SQL Assist
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<p>SQL Assist is a graphical user interface that provides a
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prompted interface to SQL statements. This is part of iSeries Navigator.
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For more information, see the iSeries Navigator online help and the Information
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||
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Center.</p></li></ul>
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|
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<hr /><br />
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|
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[ <a href="#Top_Of_Page">Top of Page</a> | <a href="rbafzmstsqlrwho.htm">Previous Page</a> | <a href="rbafzmstprintthis.htm">Next Page</a> | <a href="rbafzmst02.htm#wq1">Contents</a> |
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<a href="rbafzmstindex.htm#index">Index</a> ]
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<a id="Bot_Of_Page" name="Bot_Of_Page"></a>
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</body>
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</html>
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