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

SQL databases versus NoSQL

One of the largest decisions to make when planning a new database deployment is whether to use a Structured Query Language (SQL) or Not only SQL (NoSQL) database. These two types of databases differ greatly and making the wrong choice can compromise the performance and the ability of your application to function.

First, let's discuss the key features of both database types before doing a deep comparison of both so that you can decide between them.

SQL databases

SQL databases are designed to excel in storing structured data. They can carry out complex querying and they commonly store the minimum data possible by reducing any duplication of the data in a table in a process known as normalization. Normalized data means that accessing it often requires complex joins of different tables.

Normalized data would look similar to this:

Figure 2.1 – RDBMS table structure

These tables only contain the specific columns...