Storing PL/SQL function in the Database : Function « Function Procedure Packages « Oracle PL/SQL Tutorial

create [or replace]
function function name (parameters)
return ...
SQL> create or replace
  2  function getArea (i_rad NUMBER)
  3     return NUMBER
  4  is
  5      v_pi NUMBER:=3.14;
  6  begin
  7     return v_pi * (i_rad ** 2);
  8  end;
  9  /

Function created.


27.1.2.Describe a user-defined function
27.1.3.create or replace FUNCTION iifn(boolean_expression in BOOLEAN,true_number IN NUMBER,false_number IN NUMBER)
27.1.4.Storing PL/SQL function in the Database
27.1.5.Create a simple function
27.1.6.Creating a Function to deal with business rules
27.1.7.CREATE OR REPLACE a function
27.1.8.Calling a Function
27.1.9.Calling a Function for a table
27.1.10.Function without parameters
27.1.11.Exit a function
27.1.12.How to Call a Function from PL/SQL With or Without Parameters
27.1.13.Local Subprograms
27.1.14.Dependency Example
27.1.15.The FullName Function
27.1.16.PLW-05005: function NO_RETURN returns without value at line 21
27.1.17.Use function to check passwords