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Oracle Tutorials - Define Default Values for Formal Parameters

By: FYIcenter.com

(Continued from previous topic...)

How To Define Default Values for Formal Parameters?

If you have an IN parameter, you can make it as an optional parameter for the calling statement by defining the formal parameter with the DEFAULT clause. This gives you the freedom of not providing the actual parameter when calling this procedure or function. See the following tutorial script shows you an example procedure with an optional parameter:

SQL> CREATE OR REPLACE PROCEDURE WELCOME AS
  2    PROCEDURE GREETING(S IN CHAR DEFAULT 'FYICenter') AS
  3    BEGIN
  4      DBMS_OUTPUT.PUT_LINE('Welcome to ' || S);
  5    END;
  6  BEGIN        
  7    GREETING('MySpace.com');
  8    GREETING;
  9  END;
 10  /     
Procedure created.

SQL> EXECUTE WELCOME;
Welcome to MySpace.com
Welcome to FYICenter

(Continued on next topic...)

  1. What Is a Procedure?
  2. What Is a Function?
  3. How To Define an Anonymous Procedure without Variables?
  4. How To Define an Anonymous Procedure with Variables?
  5. How To Create a Stored Procedure?
  6. How To Execute a Stored Procedure?
  7. How To Drop a Stored Procedure?
  8. How To Pass Parameters to Procedures?
  9. How To Create a Stored Function?
  10. How To Call a Stored Function?
  11. How To Drop a Stored Function?
  12. How To Call a Stored Function with Parameters?
  13. How To Define a Sub Procedure?
  14. How To Call a Sub Procedure?
  15. How To Define a Sub Function?
  16. Can Sub Procedure/Function Be Called Recursively?
  17. What Happens If Recursive Calls Get Out of Control?
  18. What Is the Order of Defining Local Variables and Sub Procedures/Functions?
  19. What Is the Difference between Formal Parameters and Actual Parameters?
  20. What Are the Parameter Modes Supported by PL/SQL?
  21. How To Use "IN" Parameter Properly?
  22. How To Use "OUT" Parameter Properly?
  23. How To Use "IN OUT" Parameter Properly?
  24. How To Define Default Values for Formal Parameters?
  25. What Are Named Parameters?
  26. What Is the Scope of a Local Variable?

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