using the nvl function : NULL « Data Type « Oracle PL / SQL






  1. Oracle PL / SQL
  2. Data Type
  3. NULL

using the nvl function

 
SQL> select 12 from dual where nvl(null,'X') = nvl(null,'X');

        12
----------
        12

1 row selected.

SQL>
SQL>
SQL>








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1.2 meaningless values can't be compared against one another
2.This in the only way to do it properly to get the desired results