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WGU D427 OBJECTIVE ASSESSMENT
FINAL EXAM 100 QUESTIONS
COVERING DATA MODELI NG, SQL
QUERIES, DATABASE DE SIGN,
NORMALIZATION, AND R ELATIONAL
DATABASE MANAGEMENT SYSTEMS.
Question :Write a Query that Selects all fields from
"Customers" where country is "Germany" AND city must be "Berlin" OR "Stuttgart"
Correct answer:SELECT *
FROM Customers WHERE Country = 'Germany' AND (City = 'Berlin' OR City = 'Stuttgart');
Question :Write a Query that selects all customers from
the "Customers" table, sorted by the "Country" and the "CustomerName" column. This means that it orders by Country, but if some rows have the same Country, it orders them by CustomerName
Correct answer:SELECT *
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FROM Customers ORDER BY Country, CustomerName;
Question :Insert a new record into the "Customers" table,
but only insert data in the "CustomerName", "City", and "Country" columns
Correct answer:INSERT INTO Customers
(CustomerName, City, Country) VALUES ('Rick', 'Lexington', 'USA');
Question :Lists all customers from the Customers table
with a NULL value in the "Address" field
Correct answer:SELECT *
FROM Customers WHERE Address IS NULL;
Question :List all customers from the Customers table
without a NULL value in the CustomerName field
Correct answer:SELECT *
FROM Customers
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WHERE CustomerName IS NOT NULL;
Question :Update the first customer (CustomerID = 1)
with a new contact person and a new city in the Customer Table
Correct answer:UPDATE Customer
SET ContactPerson = 'John', City = 'Lexington' WHERE CustomerID = 1;
Question :Deletes the customer "Alfreds Futterkiste" from
the "Customers" table
Correct answer:DELETE FROM Customers
WHERE CustomerName = 'Alfreds Futterkiste';
Question :Delete all records from the Customers table
Correct answer:DELETE FROM Customers;
Question :Write a query statement that finds the price of
the cheapest product in the Products table
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Correct answer:SELECT MIN(Price)
FROM Products;
Question :Write a query that finds the maximum
population in the USA from the World Table
Correct answer:SELECT MAX(Population)
FROM World WHERE Country = 'USA';
Question :Write a query to find the total number of Users
in the Google table
Correct answer:SELECT COUNT(UserID)
FROM Google;
Question :Write a query to find the average amount of
cars in the Neighborhood Table
Correct answer:SELECT AVG(Cars)
FROM Neighborhood;