W3Schools SQL Test Questions and Answers

SQL QUIZ

1. What does SQL stand for?

You answered:

Structured Query Language

 Correct Answer!

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2. Which SQL statement is used to extract data from a database?

You answered:

SELECT

 Correct Answer!

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

You answered:

UPDATE

 Correct Answer!

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4. Which SQL statement is used to delete data from a database?

You answered:

DELETE

 Correct Answer!

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

You answered:

INSERT INTO

 Correct Answer!

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6. With SQL, how do you select a column named "FirstName" from a table named "Persons"?

You answered:

SELECT FirstName FROM Persons

 Correct Answer!

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7. With SQL, how do you select all the columns from a table named "Persons"?

You answered:

SELECT * FROM Persons

 Correct Answer!

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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!

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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!

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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!

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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!

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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!

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13. Which SQL statement is used to return only different values?

You answered:

SELECT DISTINCT

 Correct Answer!

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

You answered:

ORDER BY

 Correct Answer!

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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!

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16. With SQL, how can you insert a new record into the "Persons" table?

You answered:

INSERT INTO Persons VALUES ('Jimmy', 'Jackson')

 Correct Answer!

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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!

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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!

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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!

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20. With SQL, how can you return the number of records in the "Persons" table?

You answered:

SELECT COUNT(*) FROM Persons

 Correct Answer!