Preparing for your next SQL interview? This interactive SQL MCQ list is your ultimate resource. It includes the most frequently asked SQL multiple-choice questions for 2026, covering key topics like queries, joins, indexing, and more. Test your skills and identify areas for improvement!
Note: "Score 60% or more and unlock an exclusive chance to grab up to 50% off on all self-paced SQL courses."
Let's Start!
1. What does SQL stand for?
2. Which of the following SQL statements is used to retrieve data from a data store?
3. Why use the WHERE clause in SQL?
4. Which keyword is used to sort the result set in ascending order?
5. Which SQL command is used to add new rows to a table?
6. Which type of JOIN returns all rows from both tables, with NULLs where there is no match?
7. What does an INNER JOIN do?
8. Which clause is used to combine rows from two or more tables based on a related column?
9. What is the result of a LEFT JOIN if there is no match in the right table?
10. Which keyword is used to specify the condition for a JOIN?
11. Which SQL function counts the number of rows in a result set?
12. Why use the GROUP BY clause?
13. Which clause is used to filter grouped results?
14. Which SQL function calculates the average value of a column?
15. What does the SUM function do in SQL?
16. What is a primary key in SQL?
17. Why use foreign keys?
18. Which SQL clause is used to limit the number of rows returned?
19. What is a subquery in SQL?
20. What does the DISTINCT keyword do in SQL?
21. What is an index in SQL?
22. Which SQL command is used to remove a table from a database?
23. What does the TRUNCATE command do?
24. Which clause can be used to return only the top 5 rows of a result set?
25. What is the purpose of the EXPLAIN command in SQL?
26. Which SQL command is used to modify existing data in a table?
27. What does the NOT NULL constraint ensure?
28. Which SQL data type is used to store large text data?
29. What does the UNIQUE constraint do?
30. Which operator is used to search for a pattern in a column?
31. Which function returns the current date and time in SQL?
32. What does the COALESCE function do?
33. Which operator is used to check if a value exists in a set?
34. What does the CASE statement do in SQL?
35. Which function concatenates strings in SQL?
36. What is a transaction in SQL?
37. Which SQL command is used to save a transaction?
38. What does the ROLLBACK command do?
39. Which SQL command grants permissions to a user?
40. What is the purpose of the REVOKE command?
41. Which operator is used to combine multiple SELECT statements?
42. What does the EXISTS operator test for?
43. Which SQL clause is used to rename a column in the result set?
44. What does the BETWEEN operator do?
45. Which SQL command is used to create a new table?
46. What is a view in SQL?
47. What is the purpose of the CHECK constraint?
48. Which SQL clause is used to retrieve unique values from a column?
49. What is the difference between DELETE and TRUNCATE?
50. Why is normalization important in database design?
51. What is the purpose of a Common Table Expression (CTE) in SQL?
52. Which SQL function is used to assign a rank to each row within a partition of a result set?
53. What does the ROW_NUMBER() function do in SQL?
54. Which clause is required when using window functions like RANK()?
55. What is the main difference between RANK() and DENSE_RANK()?
56. Which SQL command is used to modify the structure of an existing table?
57. What does the PARTITION BY clause do in a window function?
58. Which SQL function is used to calculate a running total within a partition?
59. What is the purpose of the INTERSECT operator in SQL?
60. What does the EXCEPT operator do in SQL?
61. Which SQL clause is used to define a temporary name for a table in a query?
62. What is the purpose of the LEAD function in SQL?
63. What is the main advantage of using an index on a frequently queried column?
64. Which SQL command is used to create a stored procedure?
65. What is the purpose of a trigger in SQL?
66. What does the LAG function do in SQL?
67. What is the purpose of the NULLIF function in SQL?
68. Which SQL clause is used to specify the order of rows in a window function?
69. What is the main disadvantage of overusing indexes in a database?
70. What is the purpose of the MERGE statement in SQL?
71. Which cloud platform offers Azure SQL Database as a managed database service?
72. Which SQL feature is widely used in modern analytics and reporting queries?
73. Which SQL command is commonly used to improve database query performance?
74. Which database is popularly used for cloud-based data warehousing?
75. Which SQL keyword is used to retrieve only unique records?
76. Which SQL statement is used in data engineering pipelines for transforming data?
77. Which SQL join returns matching records from both tables only?
78. Which SQL database is developed by Oracle Corporation?
79. Which SQL function is commonly used in business intelligence dashboards?
80. Which SQL clause is mainly used for data filtering in analytics queries?
81. Which modern SQL database is known for strong JSON support?
82. Which SQL keyword is used with aggregate functions for grouped records?
83. Which SQL operation is commonly optimized using partitioning?
84. Which SQL platform is widely used in enterprise-level applications?
85. Which SQL statement is used to create reusable query logic?
86. Which SQL keyword is used to sort query results?
87. Which SQL concept helps maintain data accuracy and consistency?
88. Which SQL function is useful for handling NULL values?
89. Which SQL command is commonly used in ETL processes to load data?
90. Which SQL keyword is used to rename columns temporarily?
91. Which SQL database is highly popular for open-source web applications?
92. Which SQL command removes duplicate rows from query results?
93. Which SQL clause is used after GROUP BY to filter grouped data?
94. Which SQL function is used for ranking rows in analytics?
95. Which SQL concept is important for ACID compliance?
96. Which SQL operator checks for values within a given range?
97. Which SQL statement is commonly used in AI-powered analytics systems?
98. Which SQL feature helps automate database actions?
99. Which SQL keyword is used for pattern matching?
100. Which SQL statement is used to permanently save transaction changes?
101. Which SQL database is commonly used with Python and Django applications?
102. Which SQL command is used to remove all records while keeping the table structure?
103. Which SQL keyword is used to combine records from multiple tables?
104. Which SQL object stores reusable business logic inside the database?
105. Which SQL clause is used to limit returned rows in MySQL?
106. Which SQL feature is important in real-time analytics and dashboards?
107. Which SQL keyword is used to check for NULL values?
108. Which SQL database service is offered by Amazon Web Services?
109. Which SQL function is used to calculate total values?
110. Which SQL command is used to change existing records in a table?
111. Which SQL concept is used to avoid duplicate data in database design?
112. Which SQL keyword is used to arrange results in descending order?
113. Which SQL feature is heavily used in data warehousing projects?
114. Which SQL command is used to undo changes before COMMIT?
115. Which SQL statement is most commonly used by data analysts?
116. Which SQL database is fully managed and serverless in Google Cloud?
117. Which SQL keyword is used to search for values in a list?
118. Which SQL object can improve performance for repeated complex queries?
119. Which SQL feature is important for database security and access control?
120. Which SQL trend is becoming more popular in modern AI and analytics applications?
You Can Also Check:
1. Top SQL Server Interview Questions And Answer
2. PostgreSQL Tutorial For Beginners in 2026
3. How to Delete Duplicate Rows in SQL?
4. What is NoSQL Database?
5. Top Salesforce Developer Skills You Should Learn In 2026 6. What is PL/SQL- Everything You Need To Know
