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Overview
| Comment: | Updates to the "most deployed SQL database" page. |
|---|---|
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
4f5e61a9331fa6cfabe9c99b2a649113 |
| User & Date: | drh 2008-02-21 19:49:53 |
Context
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2008-02-21
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| 20:01 | More fixes to the "most widely deployed SQL database" page. check-in: 6934667274 user: drh tags: trunk | |
| 19:49 | Updates to the "most deployed SQL database" page. check-in: 4f5e61a933 user: drh tags: trunk | |
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2008-02-19
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| 16:16 | Fix a typo in the whentouse.html page. Fix formatting problems in quickstart. check-in: 491dfd2cee user: drh tags: trunk | |
Changes
Changes to pages/mostdeployed.in.
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<title>SQLite: Most Widely Deployed SQL Database</title> <h2>Most Widely Deployed Database</h2> <p>We <em>believe</em> that there are more copies of SQLite in use around the world than any other SQL database engine, and possibly all other database engines combined. We cannot be certain of this since we have no way of measuring either the number of SQLite deployments nor the number of deployments of other databases. But we beleave the claim is defensible.</p> <p>The belief that SQLite is the most widely deployed SQL database engine stems from its use as an embedded database. Other database engines, such as MySQL, PostgreSQL, or Oracle, ................................................................................ <h3>Estimates</h3> <p>At the end of 2006, there were 100 million websites on the internet. <a href="http://news.netcraft.com/archives/2006/11/01/november_2006_web_server_survey.html">[1]</a> Let us use that number as a proxy for the number of deployed SQL database engines other than SQLite. Not every website runs an SQL database engine. Larger websites run multiple database engines. But the vast majority of smaller websites (the long tail) share a database engine with several other websites, if they use database engine at all Hopefully these two factors cancel each other out and give 100 million as a reasonable estimate for the number of non-SQLite SQL database engines currently deployed.</p> <p>Now let's consider where SQLite is used:</p> <ul> <li>125 million copies of Mozilla Firefox <a href="http://arstechnica.com/news.ars/post/20071202-mozilla-coo-over-125-million-people-use-firefox.html">[2]</a></li> <li>20 million Mac computers, each of which contains multiple copies of SQLite</li> <li>20 million websites run PHP which has SQLite built in. <a href="http://www.php.net/usage.php">[3]</a> We have no way of estimating what fraction of those sites actively use SQLite, but we think it is a significant fraction.<li> <li>300 million downloads of the <a href="http://www.skype.com/">Skype</a> client software and 100 million registered users <a href="http://skypejournal.com/blog/archives/2006/04/how_many_users_does_skype_have_today.php">[4]</a>. All recent versions of the Skype client use SQLite internally.</li> <li>20 million Symbian smartphones shipped in Q3 2007 <a href="http://www.symbian.com/news/pr/2007/pr20079552.html">[5]</a> Newer versions of the SymbianOS have SQLite built in. It is unclear |
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<title>SQLite: Most Widely Deployed SQL Database</title> <h2>Most Widely Deployed SQL Database</h2> <p>We <em>believe</em> that there are more copies of SQLite in use around the world than any other SQL database engine, and possibly all other SQL database engines combined. We cannot be certain of this since we have no way of measuring either the number of SQLite deployments nor the number of deployments of other databases. But we beleave the claim is defensible.</p> <p>The belief that SQLite is the most widely deployed SQL database engine stems from its use as an embedded database. Other database engines, such as MySQL, PostgreSQL, or Oracle, ................................................................................ <h3>Estimates</h3> <p>At the end of 2006, there were 100 million websites on the internet. <a href="http://news.netcraft.com/archives/2006/11/01/november_2006_web_server_survey.html">[1]</a> Let us use that number as a proxy for the number of deployed SQL database engines other than SQLite. Not every website runs an SQL database engine, and not ever SQL database engine runs a website. Larger websites run multiple database engines. But the vast majority of smaller websites (the long tail) share a database engine with several other websites, if they use database engine at all. So using the number of websites as a surrogate for the number of operational SQL database engines is a crude approximation, but it is the best we have so we will go with it. (Readers are encouraged to submit better estimates.)</p> <p>Now let's consider where SQLite is used:</p> <ul> <li>125 million copies of Mozilla Firefox <a href="http://arstechnica.com/news.ars/post/20071202-mozilla-coo-over-125-million-people-use-firefox.html">[2]</a></li> <li>20 million Mac computers, each of which contains multiple copies of SQLite</li> <li>20 million websites run PHP which has SQLite built in. <a href="http://www.php.net/usage.php">[3]</a> We have no way of estimating what fraction of those sites actively use SQLite, but we think it is a significant fraction.</li> <li>300 million downloads of the <a href="http://www.skype.com/">Skype</a> client software and 100 million registered users <a href="http://skypejournal.com/blog/archives/2006/04/how_many_users_does_skype_have_today.php">[4]</a>. All recent versions of the Skype client use SQLite internally.</li> <li>20 million Symbian smartphones shipped in Q3 2007 <a href="http://www.symbian.com/news/pr/2007/pr20079552.html">[5]</a> Newer versions of the SymbianOS have SQLite built in. It is unclear |