1. What is SQL?

2. How does the SELECT statement work?

3. What is the UPDATE statement?

4. How does the DELETE statement work?

5. What is an INNER JOIN?

6. What is a LEFT JOIN?

7. What is a RIGHT JOIN?

8. What is a FULL JOIN?

9. How does the BETWEEN operator work?

10. How does the IN operator work?

11. What is the role of the ON clause in SQL joins?

12. How does the AND operator work in SQL?

13. What is ORDER BY used for?

14. How does the GROUP BY clause work?

15. What is the WHERE clause used for?

16. What is the HAVING clause?

17. What is the DISTINCT keyword?

18. How does the LIMIT clause work?

19. What is a self join?

20. What are aggregate functions?

21. What is the function of IS NULL?

22. What is the use of COUNT() in SQL?

23. What is the SQL syntax to create a new database?

24. How do you drop a table in SQL?

25. What is the ALTER TABLE statement?

26. How does the UNION operator work?

27. What does UNION ALL do?

28. How does the EXISTS keyword work?

29. What is the function of the NOT EXISTS clause?

30. How does the CASE statement work?

31. What is the COALESCE function?

32. What does the LIKE operator do?

33. What is the purpose of the MAX() function?

34. What does the MIN() function do?

35. What is a primary key?

36. What is a foreign key?

37. What is a subquery?

38. What is the TRUNCATE TABLE command?

39. How does the SQL DROP DATABASE command work?

40. What is an index in SQL?

41. What is a JOIN expression in SQL?

42. What is a View in SQL?

43. What is a Transaction in SQL?

44. What are Integrity Constraints?

45. What are SQL Data Types and Schemas?

46. How is an Index defined in SQL?

47. What is Authorization in SQL?

48. What is the SQL Query Language Overview?

49. What is SQL Data Definition?

50. What is the Basic Query Structure of SQL Queries?