Important
The SingleStore 9.1 release candidate (RC) is available now. It will be promoted to general availability (GA) soon and at that time it will be renamed to SingleStore 10.
In the interim, SingleStore 9.1 RC can be used to preview, evaluate, and provide feedback on the new and upcoming features in SingleStore 10, while SingleStore 9.0 is recommended for production workloads.
LOG
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The LOG() function returns the logarithm of the given argument, optionally in the specified base.
If only one argument is given, this function returns the natural logarithm to base e.
Syntax
LOG ( base, number )LOG ( number )
Arguments
-
base: Base of the logarithm. -
number: Number to take the logarithm of.
Note
LOG(n) is an alias for LN(n).
LOG(b, n) is equivalent to LN(n) / LN(b).
Return Type
Float or double.NULL.
Examples
SELECT LOG(2, 16);
+------------+
| LOG(2, 16) |
+------------+
| 4 |
+------------+SELECT LOG(2, 1234);
+-------------------+
| LOG(2, 1234) |
+-------------------+
| 10.26912667914942 |
+-------------------+SELECT LOG(1234);
+--------------------+
| LOG(1234) |
+--------------------+
| 7.1180162044653335 |
+--------------------+SELECT LN(1234);
+--------------------+
| LN(1234) |
+--------------------+
| 7.1180162044653335 |
+--------------------+SELECT LOG(10, 1000), LN(1000) / LN(10);
+--------------------+--------------------+
| LOG(10, 1000) | LN(1000) / LN(10) |
+--------------------+--------------------+
| 2.9999999999999996 | 2.9999999999999996 |
+--------------------+--------------------+SELECT LOG(-9);
+---------+
| LOG(-9) |
+---------+
| NULL |
+---------+Last modified: