Book Image

AWS Certified Database – Specialty (DBS-C01) Certification Guide

By : Kate Gawron
5 (1)
Book Image

AWS Certified Database – Specialty (DBS-C01) Certification Guide

5 (1)
By: Kate Gawron

Overview of this book

The AWS Certified Database – Specialty certification is one of the most challenging AWS certifications. It validates your comprehensive understanding of databases, including the concepts of design, migration, deployment, access, maintenance, automation, monitoring, security, and troubleshooting. With this guide, you'll understand how to use various AWS databases, such as Aurora Serverless and Global Database, and even services such as Redshift and Neptune. You’ll start with an introduction to the AWS databases, and then delve into workload-specific database design. As you advance through the chapters, you'll learn about migrating and deploying the databases, along with database security techniques such as encryption, auditing, and access controls. This AWS book will also cover monitoring, troubleshooting, and disaster recovery techniques, before testing all the knowledge you've gained throughout the book with the help of mock tests. By the end of this book, you'll have covered everything you need to pass the DBS-C01 AWS certification exam and have a handy, on-the-job desk reference guide.
Table of Contents (24 chapters)
1
Part 1: Introduction to Databases on AWS
Free Chapter
2
Chapter 1: AWS Certified Database – Specialty Overview
5
Part 2: Workload-Specific Database Design
12
Part 3: Deployment and Migration and Database Security
16
Part 4: Monitoring and Optimization
20
Part 5: Assessment
21
Chapter 16: Exam Practice

Relational database management systems

SQL or RDBMS databases have two main types, which describe the way data is stored on disk:

  • Row-orientated
  • Column-orientated

The different methods of storing the data and how it is arranged will offer very different performance patterns (that is, fast at some things but slow at others), and knowing about the right type to use can greatly improve the performance of your application. While both database types may appear very similar on the surface, they are quite different under the hood.

In the exam, there may be a question around a customer use case and asking which database would be the best fit.

First, let's look at row-orientated, which is the more common database system.

Row-orientated databases

In a row-orientated database, the data is stored in tables in normalized form (we discussed this in the SQL databases section) with links or keys between them.

Row-orientated databases store the data in continuous...