DBMS Made Simple: SQL, Normalization and Exam Tips
Understand databases the way exams and interviews ask - with examples.
By DigitalNepal · Updated 2026-09-15
DBMS questions repeat: ER diagrams, SQL queries, normalization and transactions cover 80% of marks. Learn each with one running example, like a college database.
Steps
1Learn SQL by doing
Install MySQL or use SQLite. Practise SELECT, JOIN, GROUP BY on a 3-table college database daily.
2Master normalization with one example
Take an unnormalised admission table to 1NF, 2NF, 3NF step by step - examiners love this question.
3Draw ER diagrams neatly
Entities as rectangles, relationships as diamonds, keys underlined. Neat diagrams earn marks.
4Understand ACID simply
Atomicity, Consistency, Isolation, Durability - learn with the eSewa money-transfer example.
Good to know: SQL is a career skill, not just a subject. Real SQL ability doubles your internship chances.
FAQ
Which database should I practise?
MySQL for jobs, SQLite for zero-setup practice. Concepts transfer everywhere.
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