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MySQL Tutorial/Math Numeric Functions/LOG2 - История изменений
2026-05-24T20:37:17Z
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в 13:44, 26 мая 2010
2010-05-26T13:44:56Z
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Admin: 1 версия
2010-05-26T09:49:45Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>== LOG2(X) returns the base-2 logarithm of X==<br />
<br />
<p>If called with two parameters, this function returns the logarithm of X for an arbitrary base B.</p><br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="sql"><br />
mysql><br />
mysql> SELECT LOG(2,65536);<br />
+--------------+<br />
| LOG(2,65536) |<br />
+--------------+<br />
| 16 |<br />
+--------------+<br />
1 row in set (0.00 sec)<br />
mysql> SELECT LOG(10,100);<br />
+-------------+<br />
| LOG(10,100) |<br />
+-------------+<br />
| 2 |<br />
+-------------+<br />
1 row in set (0.01 sec)<br />
mysql><br />
LOG(B,X) is equivalent to LOG(X) / LOG(B).<br />
mysql></source></div>
Admin