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Querying a PostgreSQL Database in Java

AdvancedSkill Level
4.8+
87 reviews
Updated 01/2026
Connect Java to PostgreSQL with JDBC. Write secure queries, manage transactions, and handle large datasets efficiently.
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JavaProgramming
3 hr
10 videos
30 Exercises
2,500 XP
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Course Description

Learn how Java applications work with PostgreSQL databases using JDBC. You will begin by setting up database connections and running queries, then proceed to creating secure, parameterized queries with prepared statements to avoid SQL injection. The course covers techniques like filtering, sorting, and pagination, followed by multi-table queries with joins and subqueries. You will also explore aggregations and grouping operations, implement transaction management to ensure data consistency, and utilize batch processing to efficiently handle multiple operations.

Prerequisites

Intermediate SQLData Types and Exceptions in Java
1

Connecting Java to PostgreSQL

Connect Java applications to PostgreSQL using JDBC. You'll execute queries, process results, and manage connections with pooling and proper resource handling.
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2

Advanced Query Techniques

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.
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3

Advanced Data Retrieval and Management

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.
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Querying a PostgreSQL Database in Java
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*4.8
from 87 reviews
86%
11%
1%
0%
1%
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FAQs

What tools and libraries does this course use?

You will work with the PostgreSQL JDBC driver, HikariCP for connection pooling, and core Java classes like PreparedStatement, ResultSet, and SQLException.

What Java skills should I have first?

You need experience with classes, methods, exception handling, try-with-resources, and collections like List and Map.

What SQL knowledge do I need before starting?

You should be comfortable with SELECT, INSERT, UPDATE, and DELETE statements, and understand tables and primary keys.

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