It demonstrates the core knowledge required for working in the exciting and ever-changing field of cybersecurity. Security+ validates the understanding of key troubleshooting principles across a wide range of IT-related activities and confirms an understanding of industry best practices.

While creating strong passwords and changing them regularly serves as a preferred security practice, configuring your database users to authenticate via two-factor authentication is a giant leap forward in improving your overall database security strategy. 

At a high level, SQL queries use statistics and other variables to determine what execution plan to run. As a result, a given SQL statement (SQL ID) may end up having multiple execution plans (hash plans) over time. Depending on the execution plan selected at runtime, performance can improve or degrade accordingly.

Security is one of those things that keeps DBAs awake at night, particularly if they are not following best practices and staying up to date with the latest security patches.