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

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Oracle PL/SQL Tutorial
1.Introduction
2.Query Select
3.Set
4.Insert Update Delete
5.Sequences
6.Table
7.Table Joins
8.View
9.Index
10.SQL Data Types
11.Character String Functions
12.Aggregate Functions
13.Date Timestamp Functions
14.Numerical Math Functions
15.Conversion Functions
16.Analytical Functions
17.Miscellaneous Functions
18.Regular Expressions Functions
19.Statistical Functions
20.Linear Regression Functions
21.PL SQL Data Types
22.PL SQL Statements
23.PL SQL Operators
24.PL SQL Programming
25.Cursor
26.Collections
27.Function Procedure Packages
28.Trigger
29.SQL PLUS Session Environment
30.System Tables Data Dictionary
31.System Packages
32.Object Oriented
33.XML
34.Large Objects
35.Transaction
36.User Privilege
Oracle PL/SQL Tutorial » Function Procedure Packages » Function 
27.1.4.Storing PL/SQL function in the Database
create [or replace]
function function name (parameters)
return ...
is
 ...
begin
 ...
end;
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.

SQL>
27.1.Function
27.1.1.Functions
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
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