LAMP was originally Linux, Apache, MySQL, PHP. While the L & A have parts have become more flexible, most still use MySQL. With the recent acquisition by Oracle there's no better time to demystify PostgreSQL. For years PostgreSQL has had a reputation of being difficult, but this is the furthest from the truth.
This presentation by Asher Snyder will cover installation, basic queries, stored procedures, triggers, and full-text search.
Clipping is a handy way to collect important slides you want to go back to later.