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';