14. How many records are created when you apply a Cartesian join (Cross join) to the invoice andinvoice items table?1. The following diagram is a depiction of what type of join?a.Inner Joinb. Full outer joinC. Left joind. Right join16. Select which of the following statements are true regarding inner joins. (Select all that apply)a. There is no limit to the number of table you can join with an inner join.b.Performance will most likely worsen with the more joins you makeInner joins retrieve all matching and nonmatching rows from a tabled. Inner joins are one of the most popular types of joins use17. Which of the following is true regarding Aliases? (Select all that apply.)a. Aliases are often used to make column names more readableb.SQL aliases are used to give a table, or a column in a table, a temporary name.An alias only exists for the duration of the query.18. What is wrong with the following query?SELECT Customers.CustomerName, Orders.OrderIDFROM LEFT JOIN ON Customers.CustomerID = Orders.CustomerID FROM Orders AND CustomersORDER BYCustomerName;19. Write a query to find the total number of invoices for each customer along with the customer's fullname, city and email.20. Write a query to retrieve the track name, album, artistID, and trackID for all the albums.C.table1C.table2

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14. How many records are created when you apply a Cartesian join (Cross join) to the invoice and invoice items table?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Multiple Table

In a database, a table is used to store data in the form of rows and columns. Rows are aligned horizontally and identified by one or more values in a specific column. Columns are vertically aligned and identified by a unique column name.

Question

14. How many records are created when you apply a Cartesian join (Cross join) to the invoice and
invoice items table?
1. The following diagram is a depiction of what type of join?
a.
Inner Join
b. Full outer join
C. Left join
d. Right join
16. Select which of the following statements are true regarding inner joins. (Select all that apply)
a. There is no limit to the number of table you can join with an inner join.
b.
Performance will most likely worsen with the more joins you make
Inner joins retrieve all matching and nonmatching rows from a table
d. Inner joins are one of the most popular types of joins use
17. Which of the following is true regarding Aliases? (Select all that apply.)
a. Aliases are often used to make column names more readable
b.
SQL aliases are used to give a table, or a column in a table, a temporary name.
An alias only exists for the duration of the query.
18. What is wrong with the following query?
SELECT Customers.CustomerName, Orders.OrderID
FROM LEFT JOIN ON Customers.CustomerID = Orders.CustomerID FROM Orders AND Customers
ORDER BY
CustomerName;
19. Write a query to find the total number of invoices for each customer along with the customer's full
name, city and email.
20. Write a query to retrieve the track name, album, artistID, and trackID for all the albums.
C.
table1
C.
table2

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