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LN
Return the natural logarithm of a number.
LN(number)
premdb=# SELECT LN(101);
ln
------------------
4.61512051684126
(1 row)
premdb=# SELECT LN(seasonid) FROM season;
ln
-------------------
0
0.693147180559945
1.09861228866811
1.38629436111989
1.6094379124341
1.79175946922805
1.94591014905531
2.07944154167984
...
Parent topic:Mathematical Functions