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+<!-- keywords: sqlite3_randomness -->
+<div class=nosearch>
+<a href="../c3ref/intro.html"><h2>SQLite C Interface</h2></a>
+<h2>Pseudo-Random Number Generator</h2>
+</div>
+<blockquote><pre>
+void sqlite3_randomness(int N, void *P);
+</pre></blockquote>
+<p>
+SQLite contains a high-quality pseudo-random number generator (PRNG) used to
+select random <a href="../lang_createtable.html#rowid">ROWIDs</a> when inserting new records into a table that
+already uses the largest possible <a href="../lang_createtable.html#rowid">ROWID</a>.  The PRNG is also used for
+the built-in random() and randomblob() SQL functions.  This interface allows
+applications to access the same PRNG for other purposes.</p>
+
+<p>A call to this routine stores N bytes of randomness into buffer P.
+The P parameter can be a NULL pointer.</p>
+
+<p>If this routine has not been previously called or if the previous
+call had N less than one or a NULL pointer for P, then the PRNG is
+seeded using randomness obtained from the xRandomness method of
+the default <a href="../c3ref/vfs.html">sqlite3_vfs</a> object.
+If the previous call to this routine had an N of 1 or more and a
+non-NULL P then the pseudo-randomness is generated
+internally and without recourse to the <a href="../c3ref/vfs.html">sqlite3_vfs</a> xRandomness
+method.
+</p><p>See also lists of
+  <a href="../c3ref/objlist.html">Objects</a>,
+  <a href="../c3ref/constlist.html">Constants</a>, and
+  <a href="../c3ref/funclist.html">Functions</a>.</p>
+