Find the length of the longest row in a column in oracle

Question

Does anybody know if there is a way to find what the length of the longest row in a column in Oracle?

Basically I need to get the length of the longest row and then

Answer 1

To pad all values in a column to the longest value +1 you can do:

SELECT RPAD( column_name ,(SELECT MAX(LENGTH( column_name ))+1 FROM table)) FROM table;