This document provides an overview of using Apache Pulsar as a streaming data source for Apache Flink SQL queries. It discusses how Pulsar can serve as a unified storage layer for both streaming and batch data. The document then demonstrates setting up a Pulsar source in Flink SQL, writing a continuous query over tweeted data to calculate tweet counts in tumbling windows, and sinking the results to another Pulsar topic. It concludes by providing references to documentation on Flink SQL, the Flink-Pulsar connector, and related resources.