165 lines
5.3 KiB
HTML
165 lines
5.3 KiB
HTML
<!DOCTYPE html>
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<html><head>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<link href="sqlite.css" rel="stylesheet">
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<title>Most Widely Deployed SQL Database Engine</title>
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</head>
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<body>
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Small. Fast. Reliable.<br>Choose any three.
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</div>
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<h2>Most Widely Deployed and Used Database Engine</h2>
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<p>SQLite is likely used more than all other database engines
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combined. Billions and billions of copies
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of SQLite exist in the wild. SQLite is found in:
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<ul>
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<li>Every Android device
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<li>Every iPhone and iOS device
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<li>Every Mac
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<li>Every Windows10 machine
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<li>Every Firefox, Chrome, and Safari web browser
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<li>Every instance of Skype
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<li>Every instance of iTunes
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<li>Every Dropbox client
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<li>Every TurboTax and QuickBooks
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<li>PHP and Python
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<li>Most television sets and set-top cable boxes
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<li>Most automotive multimedia systems
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<li>Countless millions of other applications
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</ul>
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<p>Since SQLite is used extensively in every smartphone, and there are
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roughly 3.5 billion (3.5e9) smartphones in active use, each holding hundreds of
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SQLite database files, it is seems likely that there are over one trillion
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(1e12) SQLite databases in active use.
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<h2>Most Widely Deployed Software Module of Any Type?</h2>
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<p>SQLite is probably one of the top five most deployed
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software modules of any description.
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Other libraries with similar reach include:
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<ul>
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<li>
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The original <a href="http://zlib.net">zlib</a> implementation by
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Jean-loup Gailly and Mark Adler.
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<li>
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The original reference implementation for
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<a href="http://www.libpng.org">libpng</a>
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<li>
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Libjpeg from the <a href="http://ijg.org">Independent JPEG Group</a>
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</ul>
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<p>
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Libc is omitted from the above list even though
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it is more common than SQLite because
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libc is not a single software component but rather several
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competing implementations (ex: BSD vs. GNU) with similar interfaces.
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There are also independent implementations of libjpeg and libpng,
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though in those cases the canonical implementations are very popular.
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</p>
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<p>
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Precise numbers are difficult to obtain and so exact rankings
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are impossible. But our best guess is that SQLite is the second
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mostly widely deployed software library, after libz.
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Some commentators observe that SQLite tends
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to be statically linked and thus have multiple instances on
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each machine, whereas libz tends to have just
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a single instance per machine in the form of a shared library or DLL.
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So even though the number of devices containing libz
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may be greater than the number of
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devices that contain SQLite, the total number of instances per device
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<em>might</em> be higher for SQLite and so SQLite <em>might</em>
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be the single most widely deployed and used software component.
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</p>
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