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Comparing LOG and LOG10

The LOG function returns the natural logarithm for the specified float expression. Natural logarithms are calculated by using the base-e system. However, the LOG10 function returns the base-10 logarithm. Use LOG and LOG10 for statistics and data analysis. The following SELECT statement calculates the logarithm of the value 1.75 in base-e, base-10, and base-2.

SELECT LOG(1.75) AS 'base-e'
    ,LOG10(1.75) AS 'base-10'
    ,LOG(1.75)/LOG(2) AS 'base-2'; 
GO

Here is the result set.

base-e             base-10            base-2
--------------------------------------------------------
0.559615787935423  0.243038048686294  0.807354922057604

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