W3Schools SQL Quiz

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

INSERT INTO

What is the most common type of join?

INNER JOIN

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

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

What does SQL stand for?

Structured Query Language

Which operator is used to select values within a range?

BETWEEN

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

ORDER BY

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

SELECT

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;

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 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 "LastName" is alphabetically between (and including) "Hansen" and "Pettersen"?

SELECT * FROM Persons WHERE LastName BETWEEN 'Hansen' AND 'Pettersen';

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

SELECT * FROM Persons;

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

SELECT COUNT(*) FROM Persons;

The NOT NULL constraint enforces a column to not accept null values

True

The OR operator displays a record if ANY of the conditions listed are true. The AND operator displays a record if ALL of the conditions are true.

True

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

UPDATE

Which SQL statement is used to create a table in a database?

CREATE TABLE

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

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');

Which operator is used to search for a specified pattern in a column?

LIKE

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 value of the column "FirstName" starts with an "a"?

SELECT * FROM Persons WHERE FirstName LIKE "a%";

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

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