What is it
PostgreSQL is a powerful, standards-compliant open-source relational database known for its advanced features — including strong support for complex queries, custom data types, and extensibility — undergraduate study covers these advanced capabilities beyond basic SQL.
Why it matters
PostgreSQL has become a favourite in modern software development for its combination of reliability, standards compliance, and advanced features like JSON support and full-text search, making it increasingly common in new projects across the industry.
Exam tip
Take advantage of PostgreSQL's advanced data types (like JSONB and arrays) when they genuinely fit the problem, rather than always normalising everything into separate tables — knowing when a slightly less 'pure' relational design is actually the more practical choice is a sign of real database design maturity.
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