Question

I am very new to Oracle PL/SQL…

What is the difference between Oracle Functions, Procedure & Triggers? And what are appropriate uses of each?

Answer 1

• Functions and Procedures:
  basically just a piece of code that you run at will. In any language Function will return a value (eg’ number of rows updated, a string etc’) and a Procedure will not return any value.
• Triggers: Are pieces of code that run because of an event; For example you have a table and you would like that after every insert to this table, you will get an email – Then you define an AFTER INSERT trigger ON myImportant table and tell it to send you an email with the contents of the recent Insert.

A trigger can and probably will use functions and procedures.