How have you worked with PostgreSQL?

Working with PostgreSQL involves several key aspects:

• Designing and optimizing the database schema considering normalization and indexes.
• Writing complex SQL queries, including JOINs, subqueries, and window functions.
• Using transactions to ensure data integrity.
• Configuring and monitoring performance, analyzing query execution plans (EXPLAIN).
• Working with PostgreSQL extensions, such as PostGIS for geospatial data or full-text search.

An example of a simple query to select users over 30 years old:

SELECT id, name, email FROM users WHERE age > 30 ORDER BY name;

It is also important to be able to work with backup and restore tools, as well as security settings and access rights.