SQL Quiz

What type of lock will deny users any access to a table?

EXCLUSIVE

Sometimes the expression "select count(*)" will return fewer rows than the expression "select count(value)".

False

The only way to join two tables is by using standard, ANSI syntax.

False

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

INSERT

With SQL, how can you insert "Olsen" as the "LastName" in the "Persons" table?

INSERT INTO Persons (LastName) VALUES ('Olsen')

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

ORDER BY

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

SELECT

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

SELECT * FROM Persons

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

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%'

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'

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'

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'

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

SELECT COUNT(*) FROM Persons

Which SQL statement is used to return only different values?

SELECT DISTINCT

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

SELECT FirstName FROM Persons

What does SQL stand for?

Structured Query Language

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

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

UPDATE

Which of the following is the correct SQL statement to use to remove rows from a table?

DELETE

With SQL, how can you delete the records where the "FirstName" is "Peter" in the Persons Table?

DELETE FROM Persons WHERE FirstName = 'Peter'

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

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

How can you change "Hansen" into "Nilsen" in the "LastName" column in the Persons table?

UPDATE Persons SET LastName='Nilsen' WHERE LastName='Hansen'

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

DELETE

The result of a SELECT statement can contain duplicate rows.

True