Querying a PostgreSQL Database in Java

Connect Java applications to PostgreSQL using JDBC. You'll execute queries, process results, and manage connections with pooling and proper resource handling.

Build secure queries with prepared statements to prevent SQL injection. You'll filter and sort data, implement joins and subqueries, and add pagination for efficient retrieval.

Aggregate data using COUNT, SUM, AVG, GROUP BY, and HAVING. You'll manage transactions for consistency, optimize operations with batch processing, and handle large objects using streaming techniques.