LOG(X), LOG(B,X): If called with one parameter, this function returns the natural logarithm of X : LOG « Math Numeric Functions « MySQL Tutorial

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MySQL Tutorial » Math Numeric Functions » LOG

21. 21. 1. LOG(X), LOG(B,X): If called with one parameter, this function returns the natural logarithm of X


mysql>

mysql> SELECT LOG(2);

+------------------+

| LOG(2)           |

+------------------+

| 0.69314718055995 |

+------------------+

1 row in set (0.00 sec)



mysql>

mysql> SELECT LOG(-2);

+---------+

| LOG(-2) |

+---------+

|    NULL |

+---------+

1 row in set (0.00 sec)



mysql>

21. 21. LOG
	21. 21. 1.	LOG(X), LOG(B,X): If called with one parameter, this function returns the natural logarithm of X
	21. 21. 2.	Using LOG with data in a table

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