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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"><html><head><title>SQLite Is Transactional</title><style type="text/css">body { margin: auto; font-family: "Verdana" "sans-serif"; padding: 8px 1%;}a { color: #45735f }a:visited { color: #734559 }.logo { position:absolute; margin:3px; }.tagline { float:right; text-align:right; font-style:italic; width:240px; margin:12px; margin-top:58px;}.toolbar { font-variant: small-caps; text-align: center; line-height: 1.6em; margin: 0; padding:1px 8px;}.toolbar a { color: white; text-decoration: none; padding: 6px 12px; }.toolbar a:visited { color: white; }.toolbar a:hover { color: #80a796; background: white; }.content { margin: 5%; }.content dt { font-weight:bold; }.content dd { margin-bottom: 25px; margin-left:20%; }.content ul { padding:0px; padding-left: 15px; margin:0px; }/* rounded corners */.se { background: url(images/se.png) 100% 100% no-repeat #80a796}.sw { background: url(images/sw.png) 0% 100% no-repeat }.ne { background: url(images/ne.png) 100% 0% no-repeat }.nw { background: url(images/nw.png) 0% 0% no-repeat }</style><meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head><body><div><!-- container div to satisfy validator --><a href="index.html"><img class="logo" src="images/SQLite.gif" alt="SQLite Logo" border="0"></a><div><!-- IE hack to prevent disappearing logo--></div><div class="tagline">Small. Fast. Reliable.<br>Choose any three.</div><table width=100% style="clear:both"><tr><td> <div class="se"><div class="sw"><div class="ne"><div class="nw"> <div class="toolbar"> <a href="about.html">About</a> <a href="sitemap.html">Sitemap</a> <a href="docs.html">Documentation</a> <a href="download.html">Download</a> <a href="copyright.html">License</a> <a href="news.html">News</a> <a href="http://www.sqlite.org/cvstrac/index">Developers</a> <a href="support.html">Support</a> </div></div></div></div></div></td></tr></table> <h2>SQLite is Transactional</h2><p>A transactional database is one in which all changes and queriesappear to beAtomic, Consistent, Isolated, and Durable(<a href="http://en.wikipedia.org/wiki/ACID">ACID</a>).SQLite implements <a href="http://en.wikipedia.org/wiki/Serializability">serializable</a>transactions that are atomic, consistent, isolated, and durable,even if the transaction is interrupted by a program crash, anoperating system crash, or a power failure to the computer.</p><p>We here restate and amplify the previous sentence for emphasis:All changes within a single transaction in SQLite either occurcompletely or not at all, even if the act of writing the changeout to the disk is interrupted by<ul><li>a program crash,</li><li>an operating system crash, or</li><li>a power failure.</li></ul><p><p>The claim of the previous paragraph is extensively checked in theSQLite regression test suite using a special test harness that simulates the effects on a database file of operating system crashes and power failures.</p><p><a href="atomiccommit.html">Additional informaton</a></p><hr><small><i>This page last modified 2007/12/11 15:54:00 UTC</i></small></div></body></html>⌨️ 快捷键说明
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