In this course, we will talk extensively about Triggers. Triggers help us centralize table validations at the lowest level along with providing support for auditing and logging. We will take an in-depth look at how to define triggers, trigger types, row level and statement level triggers, and mutating triggers. We will take an in-depth look at both DML triggers as well as System triggers. We will talk about Compound Triggers and look at various scenarios where triggers can be useful.
What are Oracle triggers?
Oracle triggers let you create procedures that are automatically executed when a specific action or event occurs. So if an INSERT, UPDATE, or DELETE statement is issued against a specific table, it will trigger a certain other procedure to be executed.
What types of triggers are available in Oracle?
There are 5 different types of Oracle triggers:
Statement triggers: DML statements on a specific table/view
Row triggers: executes for each row affected by a DML statement
INSTEAD OF triggers: executes on views run rather than the issuing statement
User event triggers: DDL statements like CREATE and ALTER, user LOGON, etc.
System event triggers: database startup, shutdown, server erros, etc.
What will I learn in this course?
You will learn:
What Oracle triggers are and why use them
Row and Statement triggers
How to create triggers
Trigger order and compound triggers
What are the prerequisites to this course?
The only prerequisite for this course is to have some basic Oracle PL/SQL knowledge. Check out this course if you want a refresher, or if you still need to learn Oracle PL/SQL Fundamentals.
Who is this course for?
This course is for anyone who wants to learn how to set up triggers in Oracle; both DML triggers and system triggers. If you are an Oracle programmer, you will definitely find this course beneficial.