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Oracle Tutorials - Define Variables before Procedures and Functions

By: FYIcenter.com

(Continued from previous topic...)

What Is the Order of Defining Local Variables and Sub Procedures/Functions?

In the declaration part, you must define all local variables before defining any sub procedures or sub functions. See the following sample script:

SQL> CREATE OR REPLACE PROCEDURE WELCOME AS
  2    SITE CHAR(80) := 'FYICenter';
  3    PROCEDURE WELCOME_PRINT(S CHAR) AS
  4    BEGIN
  5      DBMS_OUTPUT.PUT_LINE('Welcome to ' || S);
  6    END;
  7  BEGIN
  8    WELCOME_PRINT(SITE);
  9  END;
 10  /

SQL> EXECUTE WELCOME;
Welcome to FYICenter

Notice that variable SITE should be declared before procedure WELCOME_PRINT

(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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