Oracle - Define a Sub Function in Oracle

A sub function is a function defined and used inside another procedure or function. You need to define a sub function in the declaration part of the enclosing procedure or function. Sub function definition starts with the FUNCTION key word. Here is a sample script showing you how to define and use a sub function:

SQL> CREATE OR REPLACE PROCEDURE SUM_TEST AS      
  2    FUNCTION MY_SUM(X NUMBER, Y NUMBER)        
  3      RETURN NUMBER AS          
  4    BEGIN        
  5      RETURN X + Y;             
  6    END;         
  7  BEGIN          
  8    DBMS_OUTPUT.PUT_LINE('3 + 5 = ' || 
  9      TO_CHAR(MY_SUM(3,5))); 
 10    DBMS_OUTPUT.PUT_LINE('5 + 3 = ' ||
 11      TO_CHAR(MY_SUM(5,3))); 
 12  END;           
 13  /
 
SQL> EXECUTE SUM_TEST;
3 + 5 = 8
5 + 3 = 8

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2018-03-18, 449👍, 0💬