Top 15 SQL Interview Questions and Answers for Software Testing professionals || Part-A

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Here you will learn Top 15 real time SQL - Theoretical interview questions and answers asked to software testers.
1. What is SQL ?
2. What are the different types of SQL commands ? Can you explain those commands ?
3. What is an Index in SQL?
4. What is a view in SQL?
5. What is a Normalization ?
6. What is a Primary Key in SQL ?
7. What is a Foreign Key in SQL ?
8. What is a Query?
9. What is a Sub-query?
10. What is a Stored procedure ?
11. What is a Trigger?
12. Explain Distinct in SQL with example?
13. What are SQL constraints?
14. What is the difference between Delete, Truncate and Drop command?
15. What is a Join and What are the different types of joins?

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