A Database Querying Developer designs, implements, and maintains databases. They write complex SQL queries to manipulate and extract data from databases. Their tasks include creating database structures, ensuring data integrity, optimizing performance through database tuning, and developing procedures for data access. They also troubleshoot issues, implement security measures, and collaborate with other developers to integrate databases with applications. They need a deep understanding of database management systems, SQL, and sometimes NoSQL databases. Their role is critical in making data accessible, manageable, and secure for businesses.