How to select the comparison of two columns as one column in Oracle

Question

I cannot figure out how to add a column to my SELECT query indicating whether two columns contain the same data in Oracle.

I would like to write a query like:

<

Answer 1

If you want to consider null values equality too, try the following

select column1, column2, 
   case
      when column1 is NULL and column2 is NULL then 'true'  
      when column1=column2 then 'true' 
      else 'false' 
   end 
from table;