SQL Server Interview Topic 15: Final Revision Checklist

Use this topic before attending an interview. It helps you revise the most important SQL Server answers quickly.

🎯 Interview Goal

You should be able to answer these questions without reading the notes. If you struggle, open the linked topic and revise.

Q108. What are the must-know SQL Server basics?

Quick interview answer:

You must know database, table, row, column, primary key, foreign key, data type, NULL, and constraints. These are the foundation for every SQL Server interview answer.

Study in detail: Topic 1: Database Basics - Revise the basic building blocks.

Q109. What CRUD answers should you revise?

Quick interview answer:

Revise INSERT, SELECT, UPDATE, DELETE, WHERE, ORDER BY, TOP, and safe delete/update habits. Always remember the danger of missing WHERE in update and delete statements.

Study in detail: Topic 2: CRUD and Query Basics - Revise basic query operations.

Q110. What join answers should you revise?

Quick interview answer:

Revise INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN, CROSS JOIN, and SELF JOIN. Be ready to explain when records disappear because of an incorrect join.

Study in detail: Topic 3: Joins and Reports - Revise joins and report queries.

Q111. What reusable SQL answers should you revise?

Quick interview answer:

Revise stored procedures, functions, views, CTEs, CASE, and window functions. Know the purpose of each one and when you would use it.

Study in detail: Topic 4: Functions and Reusable SQL - Revise reusable SQL concepts.

Q112. What performance answers should you revise?

Quick interview answer:

Revise indexes, clustered vs nonclustered indexes, execution plans, transactions, concurrency, and slow query investigation. Explain performance from a developer point of view.

Study in detail: Topic 5: Performance and Production - Revise production basics.

Q113. What full stack answers should you revise?

Quick interview answer:

Revise API integration, parameterized queries, pagination, report filters, ORM vs raw SQL, and project discussion answers. Connect SQL Server to screens, APIs, and user requirements.

Study in detail: Topic 6: SQL in Backend APIs and Topic 12: ORM and Raw SQL Balance - Revise SQL from application point of view.

Q114. What security and production answers should you revise?

Quick interview answer:

Revise SQL injection, least privilege, sensitive data, audit logging, backups, migration scripts, rollback plans, and release verification. These answers show maturity beyond basic SQL.

Study in detail: Topic 10: Data Quality and Security and Topic 14: Release and Production Checks - Revise safe production thinking.

Final Practice

Before the interview, speak these answers aloud:

1. Explain primary key and foreign key.
2. Explain LEFT JOIN with a student marks example.
3. Explain WHERE vs HAVING.
4. Explain index and transaction.
5. Explain how your API reads data from SQL Server.
6. Explain one SQL performance issue and fix.
7. Explain one database change you would release safely.

💡 Final Interview Tip

If you cannot explain an answer in simple words, do not memorize it harder. Go back to the detailed lesson and understand the example.