SQL Mastery: From Queries to Query Optimization

<p>Follow data analyst Priya Nair through her first months at Fernwood Outfitters, an online outdoor gear retailer, as she uses SQL to answer real business questions, build analytics dashboards with window functions, diagnose slow queries using PostgreSQL's EXPLAIN ANALYZE, and refactor N+1 query patterns into fast, set-based CTEs &mdash; all before the company's biggest sale of the year.</p>

Tools: PostgreSQL, SQL, EXPLAIN ANALYZE, Window Functions, CTEs