1. What does SQL stand for?
Structured Query Language
2. Which SQL statement is used to extract data from a database?
SELECT
3. Which SQL statement is used to update data in a database?
UPDATE
4. Which SQL statement is used to delete data from a database?
DELETE
5. Which SQL statement is used to insert new data in a database?
INSERT INTO
6. With SQL, how do you select a column named "FirstName" from a table named "Persons"?
SELECT FirstName FROM Persons
7. With SQL, how do you select all the columns from a table named "Persons"?
SELECT * FROM Persons
8. With SQL, how do you select all the records from a table named "Persons" where the value of the column "FirstName" is "Peter"?
SELECT * FROM Persons WHERE FirstName='Peter'
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"?
SELECT FROM Persons WHERE FirstName LIKE '%a'
**정답 : SELECT FROM Persons WHERE FirstName LIKE 'a%'**
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
True
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"?
SELECT * FROM Persons WHERE FirstName='Peter' AND LastName='Jackson'
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"?
SELECT * FROM Persons WHERE LastName BETWEEN 'Hansen' AND 'Pettersen'
13. Which SQL statement is used to return only different values?
SELECT DISTINCT
14. Which SQL keyword is used to sort the result-set?
ORDER BY
15. With SQL, how can you return all the records from a table named "Persons" sorted descending by "FirstName"?
SELECT * FROM Persons ORDER BY FirstName DESC
16. With SQL, how can you insert a new record into the "Persons" table?
INSERT ('Jimmy', 'Jackson') INTO Persons
정답 : INSERT INTO Persons VALUES ('Jimmy', 'Jackson')
17. With SQL, how can you insert "Olsen" as the "LastName" in the "Persons" table?
INSERT INTO Persons (LastName) VALUES ('Olsen')
18. How can you change "Hansen" into "Nilsen" in the "LastName" column in the Persons table?
UPDATE Persons SET LastName='Nilsen' WHERE LastName='Hansen'
19. With SQL, how can you delete the records where the "FirstName" is "Peter" in the Persons Table?
DELETE FROM Persons WHERE FirstName = 'Peter'
20. With SQL, how can you return the number of records in the "Persons" table?
SELECT COUNT(*) FROM Persons
21. What is the most common type of join?
INNER JOIN
22. Which operator is used to select values within a range?
RANGE
정답 : BETWEEN
23. The NOT NULL constraint enforces a column to not accept NULL values.
True
24. Which operator is used to search for a specified pattern in a column?
LIKE
25. Which SQL statement is used to create a database table called 'Customers'?
CREATE DATABASE TABLE Customers
정답 : CREATE TABLE Customers
