Dive deep into the world of PostgreSQL locks with this comprehensive 48-minute video tutorial. Explore the fundamentals of database locking mechanisms, starting with an introduction to the concept and its importance in database management. Gain a thorough understanding of various lock types in PostgreSQL, including table-level, row-level, and page-level locks. Learn about specific lock modes such as ACCESS EXCLUSIVE, ACCESS SHARE, ROW SHARE, and FOR UPDATE, along with their applications and potential conflicts. Examine lock conflict matrices to understand how different lock types interact. Delve into advanced topics like deadlocks and advisory locks. Conclude with a summary of key concepts, equipping you with essential knowledge to optimize database performance and concurrency in PostgreSQL systems.