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Return the natural logarithm of 2
The LOG() function returns the natural logarithm of a specified number, or the logarithm of the number to the specified base.
From SQL Server 2012, you can also change the base of the logarithm to another value by using the optional base parameter.
LOG(number, base) -- Syntax for SQL Server
OR:
LOG(number) -- Syntax for Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse
Parameter | Description |
---|---|
number | Required. The number to return the natural logarithm of. Must be greater than 0 |
base | Optional. The base the natural logarithm is to be calculated with. Must be greater than 1 |
Works in: | SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse |
---|
Return the natural logarithm of 2 to a specified base (4):
SELECT LOG(2, 4);