Nulls First Last « Analytical Functions « Oracle PL/SQL Tutorial

16.19.Nulls First Last
16.19.1.There is an option to place nulls first or last with the analytical function
16.19.2.Nulls and Analytical Functions
16.19.3.Nulls and Analytical Functions ROW_NUMBER
16.19.4.Using NULLS FIRST
16.19.5.Default is NULLS FIRST
16.19.6.NULLS LAST and the ROW_NUMBER
16.19.7.Nulls may be excluded with a WHERE clause when using Analytical functions
16.19.8.Nulls could also be handled with a default value using the NVL function in the analytical function
16.19.9.NVL without NULLS LAST