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Kurs

Building and Optimizing Triggers in SQL Server

MedelnivåKunskapsnivå

Uppdaterad 2022-02

Learn how to design and implement triggers in SQL Server using real-world examples.

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SQLProgramming

4 tim

15 videor

49 Övningar

3,800 XP

14,932

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Kursbeskrivning

Auditing your SQL Server database and keeping data integrity can be a challenging task for DBAs and database developers. SQL Server triggers are special types of stored procedures designed to help you achieve consistency and integrity of your database. This course will teach you how to work with triggers and use them in real-life examples. Specifically, you will learn about the use cases and limitations of triggers and get practice designing and implementing them. You will also learn to optimize triggers to fit your specific needs.

Förkunskapskrav

Intermediate SQL Server

1

Introduction to Triggers

An introduction to the basic concepts of SQL Server triggers. Create your first trigger using T-SQL code. Learn how triggers are used and what alternatives exist.

Introduction

Types of trigger

Creating your first trigger

Practicing creating triggers

How DML triggers are used

When to use triggers

Creating a trigger to keep track of data changes

Trigger alternatives

Triggers vs. stored procedures

Triggers vs. computed columns

2

Classification of Triggers

Learn about the different types of SQL Server triggers: AFTER triggers (DML), INSTEAD OF triggers (DML), DDL triggers, and logon triggers.

AFTER triggers (DML)

Tracking retired products

The TrackRetiredProducts trigger in action

Practicing with AFTER triggers

INSTEAD OF triggers (DML)

Preventing changes to orders

PreventOrdersUpdate in action

Creating the PreventNewDiscounts trigger

DDL triggers

Tracking table changes

Using FOR in a trigger

Preventing table deletion

Logon triggers

Enhancing database security

Defining a logon trigger

3

Trigger Limitations and Use Cases

Find out known limitations of triggers, as well as common use cases for AFTER triggers (DML), INSTEAD OF triggers (DML) and DDL triggers.

Known limitations of triggers

Trigger limitations

Creating a report on existing triggers

Use cases for AFTER triggers (DML)

Keeping a history of row changes

Table auditing using triggers

Use cases for INSTEAD OF triggers (DML)

Preventing changes to Products

Checking stock before placing orders

Use cases for DDL triggers

Database auditing

Preventing server changes

4

Trigger Optimization and Management

Learn to delete and modify triggers. Acquaint yourself with the way trigger management is done. Learn how to investigate problematic triggers in practice.

Deleting and altering triggers

Removing unwanted triggers

Modifying a trigger's definition

Disabling a trigger

Re-enabling a disabled trigger

Trigger management

Managing existing triggers

Counting the AFTER triggers

Troubleshooting triggers

Keeping track of trigger executions

Identifying problematic triggers

Wrapping up

Building and Optimizing Triggers in SQL Server

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