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SQL / DBMS

Guide

SQL & DBMS resources

All the major SQL and DBMS resources a student usually needs in one place.

Best place to start

Start with one interactive SQL tutorial and practice every query yourself. Learn SELECT, WHERE, ORDER BY, GROUP BY, JOINs, subqueries, and basic table design before worrying about advanced optimization. In parallel, build a simple mental model of DBMS topics like normalization, keys, transactions, indexing, and ACID so interview prep does not feel disconnected from real SQL work.

Who this is for

Students, freshers, placement prep learners, and beginners learning SQL and DBMS for interviews, backend basics, data work, or practical projects.

Best place to start

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A practical first path for beginners who want SQL and DBMS to feel useful quickly without getting buried in theory too early.

3 resources
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01
01

SQLBolt

SQLBolt

CourseFreeBeginnerInteractive+1

One of the best first SQL resources because it is interactive, short, and teaches the core query flow inside the browser.

02
02

SQL Tutorial

SQLZoo

CourseFreeBeginnerPractice+1

Excellent once you want more question-style SQL practice on SELECTs, JOINs, NULLs, aggregates, and subqueries.

03
03

PostgreSQL Tutorial

PostgreSQL

WebsiteFreeOfficialPostgreSQL+1

A strong official next step when you want to connect SQL queries to a real database system instead of only toy exercises.