136 lines
4.8 KiB
HTML
136 lines
4.8 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>SQL Features That SQLite Does Not Implement</title>
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</head>
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<body>
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<a href="index.html">
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Small. Fast. Reliable.<br>Choose any three.
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<h2>SQL Features That SQLite Does Not Implement</h2>
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<p>
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SQLite implements most of the common features of SQL.
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Rather than try to list all the features of SQL that SQLite does
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support, it is much easier to list those that it does not.
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Unsupported features of SQL are shown below.</p>
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<p>
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See also the
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<a href="quirks.html">Quirks, Caveats, and Gotchas</a> of SQLite.
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<table cellpadding="10">
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<tr><td valign="top"><b><nobr>RIGHT and FULL OUTER JOIN</nobr></b></td><td width="10"> </th><td valign="top">
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LEFT OUTER JOIN is implemented, but not RIGHT OUTER JOIN or
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FULL OUTER JOIN.
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</td></tr><tr><td valign="top"><b><nobr>Complete ALTER TABLE support</nobr></b></td><td width="10"> </th><td valign="top">
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Only the RENAME TABLE, ADD COLUMN, and RENAME COLUMN variants of the
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ALTER TABLE command are supported. Other kinds of ALTER TABLE operations
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such as
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DROP COLUMN, ALTER COLUMN, ADD CONSTRAINT, and so forth are omitted.
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</td></tr><tr><td valign="top"><b><nobr>Complete trigger support</nobr></b></td><td width="10"> </th><td valign="top">
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FOR EACH ROW triggers are supported but not FOR EACH STATEMENT
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triggers.
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</td></tr><tr><td valign="top"><b><nobr>Writing to VIEWs</nobr></b></td><td width="10"> </th><td valign="top">
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VIEWs in SQLite are read-only. You may not execute a DELETE, INSERT, or
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UPDATE statement on a view. But you can create a trigger
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that fires on an attempt to DELETE, INSERT, or UPDATE a view and do
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what you need in the body of the trigger.
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</td></tr><tr><td valign="top"><b><nobr>GRANT and REVOKE</nobr></b></td><td width="10"> </th><td valign="top">
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Since SQLite reads and writes an ordinary disk file, the
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only access permissions that can be applied are the normal
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file access permissions of the underlying operating system.
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The GRANT and REVOKE commands commonly found on client/server
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RDBMSes are not implemented because they would be meaningless
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for an embedded database engine.
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</td></tr>
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</table>
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