Tag difference between mysql and mysqld

MySQL LN Function

Example Return the natural logarithm of 2: SELECT LN(2); Definition and Usage The LN() function returns the natural logarithm of a number. Note: See also the LOG() and EXP() functions.

MySQL ATAN Function

Example Return the arc tangent of a number: SELECT ATAN(2.5); Definition and Usage The ATAN() function returns the arc tangent of one or two numbers.