Azure Databricks is a powerful analytics platform that leverages Apache Spark. It provides various functions and capabilities for data processing, including the ability to split data into smaller chunks. The 'partitionBy' function in Spark SQL allows you to partition a DataFrame or Dataset into multiple partitions based on one or more columns. This can help improve the efficiency of data processing by distributing the workload across multiple nodes in a Spark cluster. While other services like Azure Data Factory, Azure Data Lake Storage Gen2, and Azure Stream Analytics have their own capabilities, they are not specifically designed for splitting data into smaller chunks for processing.