Structured Query Language MCQ (Multiple Choice Question)

SQL (Structured Query Language) MCQ Quiz | SQL Multiple Choice Questions

SQL MCQ Online Quiz: SQL is the standard for Structured Query Language is most widely used programming language for relational database. The Structured Query Language (SQL) is a valuable programming language with strong career opportunities. SQL is used to manage and organize date in all sorts of system. Structured Query language has become a most important tool in a data scientist’s toolbox because it is critical in accessing, updating, inserting, manipulating and modifying data. Almost every business has become digitized. Digital means data – data rises to databases, and, to be responsible to those databases, you require SQL. Here, we have given 30 SQL MCQ Questions and answer. You learn this below SQL MCQ Questions in this section because its very important for all. Candidates who are preparing for interview kindly use this section.

 

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Structured Query Language MCQ (Multiple Choice Question) Quiz

1. A command that lets you change one or more fields in a record is_________

1. Look-up
2. Insert
3. Modify
4. All of the above

Answer: Modify

2. Which SQL keyword is used to retrieve only unique values?

1. DISTINCTIVE
2. DISTINCT
3. UNIQUE
4. DIFFERENT

Answer: DISTINCT

3. In SQL, which command is used to SELECT only one copy of each set of duplicate rows___________

1. SELECT DIFFERENT
2. SELECT DISTINCT
3. SELECT UNIQUE
4. None

Answer: SELECT DISTINCT

4. Which of the following is a SQL aggregate function?

1. AVG
2. JOIN
3. LEFT
4. LEN

Answer: AVG

5. Which SQL statement is used to update data in a database?

1. MODIFY
2. UPDATE
3. SAVE
4. SAVE AS

Answer: UPDATE

6. Which SQL keyword is used to sort the result-set?

1. ORDER
2. SORT BY
3. ORDER BY
4. SORT

Answer: ORDER BY

7. Which of the following SQL commands is used to retrieve data?

1. INSERT
2. DELETE
3. SELECT
4. JOIN

Answer: SELECT

8. The FROM SQL clause is used to____________

1. specify search condition
2. specify what table we are selecting or deleting data FROM
3. specify range for search condition
4. None

Answer: specify what table we are selecting or deleting data FROM

9. What is the full form of SQL? 

1. Structured Query Language
2. Simple Query List
3. Structured Query List
4. None

Answer: Structured Query Language

10. Which SQL keyword is used to retrieve a maximum value?

1. MOST
2. TOP
3. UPPER
4. MAX

Answer: MAX

11. In SQL, which of the following is not a data definition language commands?

1. REVOKE
2. RENAME
3. GRANT
4. UPDATE

Answer: UPDATE

12. Which SQL statement is used to delete data FROM a database?

1. COLLAPSE
2. ALTER
3. REMOVE
4. DELETE

Answer: DELETE

13. Which of the following group functions ignore NULL values?

1. COUNT
2. MAX
3. SUM
4. All of above

Answer: All of above

14. In SQL, which command(s) is(are) used to change a table’s storage characteristics?

1. MODIFY TABLE
2. ALTER TABLE
3. CHANGE TABLE
4. None

Answer: ALTER TABLE

15. Which of the following must be enclosed in double quotes?

1. Dates
2. Column Alias
3. Strings
4. All of the above

Answer: Column Alias

16. Which of the following SQL commands can be used to add data to a database table?

1. APPEND
2. ADD
3. UPDATE
4. INSERT

Answer: INSERT

17. Which of the following join is also called as an ‘inner-join’?

1. Equijoin
2. Self-Join
3. Non-Equijoin
4. None

Answer: Equijoin

18. Which of the following is NOT a type of SQL constraint?

1. FOREIGN KEY
2. ALTERNATE KEY
3. PRIMARY KEY
4. UNIQUE

Answer: ALTERNATE KEY

19. What operator tests column for the absence of data?

1. NOT operator
2. EXISTS operator
3. IS NULL operator
4. None

Answer: IS NULL operator

20. Which of the following command makes the updates performed by the transaction permanent in the database?

1. COMMIT
2. ROLLBACK
3. TRUNCATE
4. DELETE

Answer: COMMIT

21. Which of the following is illegal?

1. SELECT SYSDATE – (SYSDATE – 2) FROM DUAL;
2. SELECT SYSDATE – SYSDATE FROM DUAL;
3. SELECT SYSDATE – (SYSDATE – 2) FROM DUAL;
4. None

Answer: None

22. The SELECT statement SELECT ‘Hi’ FROM DUAL WHERE NULL = NULL; Outputs

1. FALSE
2. Hi
3. TRUE
4. Nothing

Answer: Nothing

23. Which operator performs pattern matching?

1. LIKE operator
2. BETWEEN operator
3. EXISTS operator
4. None

Answer: LIKE operator

24. Which command undo all the updates performed by the SQL in the transaction?

1. DELETE
2. ROLLBACK
3. COMMIT
4. TRUNCATE

Answer: ROLLBACK

25. The SQL ALTER statement can be used____________

1. add rows to the table
2. delete rows from the table
3. change the table data
4. change the table structure

Answer: change the table structure

26. What is an SQL virtual table that is constructed from other tables?

1. A relation
2. view
3. Query results
4. Just another table

Answer: view

27. The command to eliminate a table from a database is__________

1. DELETE TABLE CUSTOMER
2. DROP TABLE CUSTOMER
3. REMOVE TABLE CUSTOMER
4. UPDATE TABLE CUSTOMER

Answer: DROP TABLE CUSTOMER

28. The SQL keyword(s) ________ is used with wildcards.

1. IN and NOT IN
2. IN only
3. NOT IN only
4. LIKE only

Answer: LIKE only

29. The command to remove rows from a table ‘CUSTOMER’ is___________

1. UPDATE FROM CUSTOMER
2. REMOVE FROM CUSTOMER
3. DROP FROM CUSTOMER
4. DELETE FROM CUSTOMER WHERE

Answer: DELETE FROM CUSTOMER WHERE

30. Which is the subset of SQL commands used to manipulate Oracle Database structures, including tables?

1. Data Interpretation
2. DDL (Data Definition Language)
3. DML (Data Manipulation Language)
4. None

Answer: DDL (Data Definition Language)

Read the given above SQL MCQ questions cleary then answer the following questions. Each questions has four alternatives you have to identify and choose the best answer. This above SQL (Structured Query Language) multiple choice questions is Convenient for candidate who are preparing for interview. Refer our dailyrecruitment.in site daily to get more GK Quiz, upcoming notification etc.