Use the NVL() against a non-initialized BOOLEAN variable: : NVL2 « Conversion Functions « Oracle PL/SQL Tutorial

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Oracle PL/SQL Tutorial » Conversion Functions » NVL2

15. 4. 4. Use the NVL() against a non-initialized BOOLEAN variable:


SQL> DECLARE

  2    .

  3    my_var BOOLEAN;

  4  BEGIN

  5    

  6    IF NOT NVL(my_var,FALSE) THEN

  7      dbms_output.put_line('This should happen!');

  8    ELSE

  9      dbms_output.put_line('This can''t happen!');

 10    END IF;

 11  END;

 12  /

This should happen!



PL/SQL procedure successfully completed.



SQL>

15. 4. NVL2
	15. 4. 1.	NVL2(x, value1, value2) returns value1 if x is not null.
	15. 4. 2.	nvl2(comm,12msal+comm,12msal) as yearsal
	15. 4. 3.	Use nvl2 to deal with null salary
	15. 4. 4.	Use the NVL() against a non-initialized BOOLEAN variable:

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