mysql>mysql> SELECT LOG10(2);+------------------+| LOG10(2) |+------------------+| 0.30102999566398 |+------------------+1 row in set (0.00 sec)mysql>mysql> SELECT LOG10(100);+------------+| LOG10(100) |+------------+| 2 |+------------+1 row in set (0.00 sec)mysql>mysql> SELECT LOG10(-100);+-------------+| LOG10(-100) |+-------------+| NULL |+-------------+1 row in set (0.01 sec)mysql>LOG10(X) is equivalent to LOG(10,X).mysql>
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