Tuesday, July 8, 2014

W3Schools SQL Test Questions and Answers

SQL QUIZ
1. What does SQL stand for?
You answered:
Structured Query Language
 Correct Answer!

2. Which SQL statement is used to extract data from a database?
You answered:
SELECT
 Correct Answer!

3. Which SQL statement is used to update data in a database?
You answered:
UPDATE
 Correct Answer!

4. Which SQL statement is used to delete data from a database?
You answered:
DELETE
 Correct Answer!

5. Which SQL statement is used to insert new data in a database?
You answered:
INSERT INTO
 Correct Answer!

6. With SQL, how do you select a column named "FirstName" from a table named "Persons"?
You answered:
SELECT FirstName FROM Persons
 Correct Answer!

7. With SQL, how do you select all the columns from a table named "Persons"?
You answered:
SELECT * FROM Persons
 Correct Answer!

8. With SQL, how do you select all the records from a table named "Persons" where the value of the column "FirstName" is "Peter"?
You answered:
SELECT * FROM Persons WHERE FirstName='Peter'
 Correct Answer!

9. With SQL, how do you select all the records from a table named "Persons" where the value of the column "FirstName" starts with an "a"?
You answered:
SELECT * FROM Persons WHERE FirstName LIKE 'a%'
 Correct Answer!

10. The OR operator displays a record if ANY conditions listed are true. The AND operator displays a record if ALL of the conditions listed are true
You answered:
True
 Correct Answer!

11. With SQL, how do you select all the records from a table named "Persons" where the "FirstName" is "Peter" and the "LastName" is "Jackson"?
You answered:
SELECT * FROM Persons WHERE FirstName='Peter' AND LastName='Jackson'
 Correct Answer!

12. With SQL, how do you select all the records from a table named "Persons" where the "LastName" is alphabetically between (and including) "Hansen" and "Pettersen"?
You answered:
SELECT * FROM Persons WHERE LastName BETWEEN 'Hansen' AND 'Pettersen'
 Correct Answer!

13. Which SQL statement is used to return only different values?
You answered:
SELECT DISTINCT
 Correct Answer!

14. Which SQL keyword is used to sort the result-set?
You answered:
ORDER BY
 Correct Answer!

15. With SQL, how can you return all the records from a table named "Persons" sorted descending by "FirstName"?
You answered:
SELECT * FROM Persons ORDER BY FirstName DESC
 Correct Answer!

16. With SQL, how can you insert a new record into the "Persons" table?
You answered:
INSERT INTO Persons VALUES ('Jimmy', 'Jackson')
 Correct Answer!

17. With SQL, how can you insert "Olsen" as the "LastName" in the "Persons" table?
You answered:
INSERT INTO Persons (LastName) VALUES ('Olsen')
 Correct Answer!

18. How can you change "Hansen" into "Nilsen" in the "LastName" column in the Persons table?
You answered:
UPDATE Persons SET LastName='Nilsen' WHERE LastName='Hansen'
 Correct Answer!

19. With SQL, how can you delete the records where the "FirstName" is "Peter" in the Persons Table?
You answered:
DELETE FROM Persons WHERE FirstName = 'Peter'
 Correct Answer!

20. With SQL, how can you return the number of records in the "Persons" table?
You answered:
SELECT COUNT(*) FROM Persons
 Correct Answer!

1 comment:

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