The Full Stack Web Development - Queries & Constraints in psql

This video tutorial covers using the PSQL shell to create and manage tables in a PostgreSQL database. It begins with logging into the PSQL shell and creating an 'articles' table with fields for ID, title, and body. The tutorial demonstrates inserting data into the table and selecting it. A 'categories' table is also created, and data is inserted. The video explains how to add a category ID to articles and update records. It concludes with adding a foreign key constraint and demonstrating CRUD operations, including deleting records.

What command is used to add a new column to an existing table?

Explain how to create a foreign key constraint in PostgreSQL.

What is the command to delete a record from a table in PostgreSQL?