1 files changed, 166 insertions, 0 deletions
diff --git a/www/formatchng.html b/www/formatchng.html
new file mode 100644
index 0000000..3d3c76f
--- /dev/null
+++ b/www/formatchng.html
@@ -0,0 +1,166 @@
+<!DOCTYPE html>
+<html><head>
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<meta http-equiv="content-type" content="text/html; charset=UTF-8">
+<link href="sqlite.css" rel="stylesheet">
+<title>File Format Changes in SQLite</title>
+<!-- path= -->
+</head>
+<body>
+<div class=nosearch>
+<a href="index.html">
+<img class="logo" src="images/sqlite370_banner.gif" alt="SQLite" border="0">
+</a>
+<div><!-- IE hack to prevent disappearing logo --></div>
+<div class="tagline desktoponly">
+Small. Fast. Reliable.<br>Choose any three.
+</div>
+<div class="menu mainmenu">
+<ul>
+<li><a href="index.html">Home</a>
+<li class='mobileonly'><a href="javascript:void(0)" onclick='toggle_div("submenu")'>Menu</a>
+<li class='wideonly'><a href='about.html'>About</a>
+<li class='desktoponly'><a href="docs.html">Documentation</a>
+<li class='desktoponly'><a href="download.html">Download</a>
+<li class='wideonly'><a href='copyright.html'>License</a>
+<li class='desktoponly'><a href="support.html">Support</a>
+<li class='desktoponly'><a href="prosupport.html">Purchase</a>
+<li class='search' id='search_menubutton'>
+<a href="javascript:void(0)" onclick='toggle_search()'>Search</a>
+</ul>
+</div>
+<div class="menu submenu" id="submenu">
+<ul>
+<li><a href='about.html'>About</a>
+<li><a href='docs.html'>Documentation</a>
+<li><a href='download.html'>Download</a>
+<li><a href='support.html'>Support</a>
+<li><a href='prosupport.html'>Purchase</a>
+</ul>
+</div>
+<div class="searchmenu" id="searchmenu">
+<form method="GET" action="search">
+<select name="s" id="searchtype">
+<option value="d">Search Documentation</option>
+<option value="c">Search Changelog</option>
+</select>
+<input type="text" name="q" id="searchbox" value="">
+<input type="submit" value="Go">
+</form>
+</div>
+</div>
+<script>
+function toggle_div(nm) {
+var w = document.getElementById(nm);
+if( w.style.display=="block" ){
+w.style.display = "none";
+}else{
+w.style.display = "block";
+}
+}
+function toggle_search() {
+var w = document.getElementById("searchmenu");
+if( w.style.display=="block" ){
+w.style.display = "none";
+} else {
+w.style.display = "block";
+setTimeout(function(){
+document.getElementById("searchbox").focus()
+}, 30);
+}
+}
+function div_off(nm){document.getElementById(nm).style.display="none";}
+window.onbeforeunload = function(e){div_off("submenu");}
+/* Disable the Search feature if we are not operating from CGI, since */
+/* Search is accomplished using CGI and will not work without it. */
+if( !location.origin || !location.origin.match || !location.origin.match(/http/) ){
+document.getElementById("search_menubutton").style.display = "none";
+}
+/* Used by the Hide/Show button beside syntax diagrams, to toggle the */
+function hideorshow(btn,obj){
+var x = document.getElementById(obj);
+var b = document.getElementById(btn);
+if( x.style.display!='none' ){
+x.style.display = 'none';
+b.innerHTML='show';
+}else{
+x.style.display = '';
+b.innerHTML='hide';
+}
+return false;
+}
+var antiRobot = 0;
+function antiRobotGo(){
+if( antiRobot!=3 ) return;
+antiRobot = 7;
+var j = document.getElementById("mtimelink");
+if(j && j.hasAttribute("data-href")) j.href=j.getAttribute("data-href");
+}
+function antiRobotDefense(){
+document.body.onmousedown=function(){
+antiRobot |= 2;
+antiRobotGo();
+document.body.onmousedown=null;
+}
+document.body.onmousemove=function(){
+antiRobot |= 2;
+antiRobotGo();
+document.body.onmousemove=null;
+}
+setTimeout(function(){
+antiRobot |= 1;
+antiRobotGo();
+}, 100)
+antiRobotGo();
+}
+antiRobotDefense();
+</script>
+
+
+<h2>File Format Changes in SQLite</h2>
+
+<p>
+The <a href="fileformat2.html">underlying file format</a> for SQLite databases does not
+change in incompatible ways.  There are literally trillions of
+SQLite database files in circulation and the SQLite developers are
+committing to supporting those files for decades into the future.
+</p>
+
+<p>
+Prior to SQLite version 3.0.0 (2004-06-18), the file format did
+sometimes change from one release to the next.  But since that time,
+the file format has been fully backwards compatible.
+</p>
+
+<p>
+By "backwards compatible" we mean that
+newer versions of SQLite can always read and write database files created
+by older versions of SQLite.
+It is often also the case that SQLite is "forwards compatible", that
+older versions of SQLite can read and write database files created by
+newer versions of SQLite.  But there are sometimes forward compatibility
+breaks.  Sometimes new features are added to the file format.  For
+example, <a href="wal.html">WAL mode</a> was added in version 3.7.0 (2010-07-21).  
+SQLite 3.7.0 and later can read and write all database files created
+by earlier versions of SQLite.  And earlier versions of SQLite can
+read and write database files created by SQLite 3.7.0 and later
+<i>as long as the database does not use WAL mode</i>.  But versions of
+SQLite prior to version 3.7.0 cannot read nor write SQLite database files
+that make use of WAL mode.
+</p>
+
+<h2>Summary</h2>
+
+<ul>
+<li><p>
+Newer versions of SQLite can always read and/or write database files
+created by older versions of SQLite, back to version 3.0.0 (2004-06-18).
+
+<li><p>
+Older versions of SQLite back to version 3.0.0 can read and write
+database files created by newer versions of SQLite as long as the
+database does not make use of newer features that are unknown to that
+older version.
+</ul>
+<p align="center"><small><i>This page last modified on  <a href="https://sqlite.org/docsrc/honeypot" id="mtimelink"  data-href="https://sqlite.org/docsrc/finfo/pages/formatchng.in?m=8415958e0a">2022-09-13 14:04:46</a> UTC </small></i></p>
+