Which of the following is NOT a method for defining custom metrics?

The answer highlights that employing standard SQL queries is not a method for defining custom metrics in Dynatrace. Instead, custom metrics are typically defined through various mechanisms designed specifically for that purpose, such as using custom-defined OneAgent plugins, which enable the collection and reporting of metrics tailored to specific applications or infrastructure.

Utilizing custom JMX (Java Management Extensions) definitions allows you to extract metrics directly from Java applications, enhancing visibility into their performance. Additionally, registering metrics via the REST API offers a flexible way to programmatically create and manage custom metrics within the Dynatrace environment.

Standard SQL queries, while useful for querying and retrieving data from databases, do not directly relate to the creation or definition of custom metrics within Dynatrace; rather, they are used to access stored data rather than define new metrics for monitoring.