What is the primary function of "spark-submit" in Databricks?

The primary function of "spark-submit" in Databricks is to submit a Spark application to a cluster for execution. This command-line interface tool is essential for deploying Spark applications, whether they are written in Scala, Java, Python, or R. It allows users to specify various properties for the Spark job, such as the main application file, configuration settings, and resources required, enabling the application to run efficiently on a distributed cluster.

While connecting to external databases, creating and editing notebooks, and visualizing data on dashboards are all important tasks within the Databricks environment, they do not relate directly to the function of "spark-submit." This tool is specifically designed for execution management of Spark jobs, making it a critical part of the Spark ecosystem in handling and running big data applications.