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Library/Kiến trúc & Database/PostgreSQL
Easy#postgresql

Khi nào nên sử dụng CTE (Common Table Expressions) trong PostgreSQL?

February 15, 2026

Quick summary

CTEs in PostgreSQL are used to improve query readability (replacing nested subqueries), perform recursive queries (tree traversal), and chain data-modifying statements (Writable CTEs). Since PostgreSQL 12, performance overhead is largely eliminated thanks to the optimizer's automatic inlining mechanism.

Sample answer:

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam.

Quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore.

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