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Introduction to SQL and Database Design

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Step-by-step SQL tutorials and practical examples covering queries, constraints, transactions, and more. Ideal for beginners, interview prep, and anyone looking to master SQL—from basics to advanced.

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From Junior to Senior -- DBA

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แบบฝึกหัด T-SQL LAB02–LAB11 ประกอบหลักสูตร SQL Query (DataFabric-Academy) — sample database TSQL ดัดแปลงจาก TSQLV6

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Free ZrozumSQL course: 169 PostgreSQL lessons on YouTube (Polish, English subtitles). Scripts and files used in the course.

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• PLpgSQL

A comprehensive SQL & GenAI course: Master data engineering, SQL essentials, and AI-assisted workflows with hands-on, browser-based labs.

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• Updated Nov 11, 2026