Lectures

In this lecture, you'll learn how to create multi-step procedures for order processing in PostgreSQL: you'll implement validation, status updates, logging, and error handling with rollback. We'll look at a practical example with test data and break down common mistakes.

In this lecture, you'll learn how locks work in PostgreSQL, what types there are, what a deadlock is, how to avoid it, and how to diagnose and manage locks using PostgreSQL tools. Practical tips and examples will help you work safely with transactions and keep your data consistent.

In this lecture, you'll learn how to build error-resistant procedures with nested transactions in PostgreSQL. Using a payment system as an example, we'll break down how to use EXCEPTION blocks for partial rollbacks, log errors, and keep your data consistent when working with client balances.

In this lecture, you'll learn how to optimize procedures in PostgreSQL with transactions in mind: minimize overhead, speed up queries using indexes, analyze performance with EXPLAIN ANALYZE, handle errors smartly, and implement partial rollbacks. Practical examples and tips will help you make your procedures fast and robust.

In this lecture, we’ll break down the most common mistakes and gotchas when working with nested transactions in PostgreSQL: misusing transactional commands in functions and procedures, deadlocks, dynamic SQL, error handling, and ways to avoid these issues. Real-world examples and tips will help you dodge problems in actual projects.