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LOG Function

Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).

Returns the logarithm of a number to the base you specify.





The positive number for which you want the logarithm.


The base of the logarithm. If omitted, the base is 10.

A decimal number.

You might receive an error if the value is too large to be displayed.

The function LOG10 is similar, but always returns the common logarithm, meaning the logarithm for the base 10.

The following formulas return the same result, 2.

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