Refer to the exhibit. The exhibit shows the structures of the Drivers and Orders data tables for a pizza delivery service. The same driver may deliver multiple orders on an average day. What type of relationship exists between the Drivers table and the Orders table?

There is a one-to-many relationship between the two tables because one driver may have many orders, but an order can have only one driver.

The two tables have a one-to-one relationship because both have DriverID as the primary key.

There is a many-to-many relationship between the two tables because there are many drivers and many orders in the tables.

There is a one-to-one relationship between the two tables because DriverID is a common identifier for the records in both tables.

Refer to the exhibit. You need to get information about customer purchases that is stored in the two tables. You would like to see data from the OrderID, CustomerName, OrderAmount, and OrderDate columns. To obtain this information, how would you complete the following partial SQL query? SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderAmount, Orders.OrderDate FROM Orders INNER JOIN _______ ON _____________ = _____________;

INNER JOIN Customers ON Orders.CustomerID=Customers.CustomerID;

INNER JOIN Orders ON Orders.OrderID=Orders.CustomerID;

INNER JOIN Customers ON Customer.CustomerID=Customers.CustomerID;

INNER JOIN Orders ON Orders.CustomerID=Customers.CustomerID;

Which JOIN clause would join the two tables Orders and Customers, using the CustomerID field in both tables as the relationship between the two tables? SELECT * FROM Orders LEFT JOIN Customers ON ____________ = ______________;

ON Orders.CustomerID=Customers.CustomerID

ON Customers.CustomerID=Orders.CustomerID

ON Orders.CustomerID=Orders.CustomerID

ON Customers.CustomerID=Customers.CustomerID

What is the function of a foreign key in a relational database table?

to define a relationship with a primary key in a different table

to uniquely identify a row within the table

to create a many-to-one relationship within the table

to add additional unique columns to the data table

Review the columns and descriptions in each table, Movie, and Award . Data from the two tables need to be combined to extract the title and cost of movies that won awards. Can a NATURAL JOIN be used to accomplish the desired result? Movie table: MovieID - primary key Title - name of the movie Date - date the movie was released Cost - total cost of production Award table: AwardID - primary key MovieID - foreign key Category - award category Name - name of the award Date : day the award was received

No, because the Date column contains different data types in each table.

Yes, because both tables have two common columns.

Yes, because both tables have the MovieID column.

No, because an OUTER JOIN should be used to extract all of the information.

What is the result of the query shown in the example? UPDATE Review SET Comment = 'This is the new comment' WHERE MovieId = 3456 AND AuthorName = 'PuzoFan76';

The comment made by PuzoFan76 for the movie with the ID 3456 will be modified to say, “This is a new comment.”

A new comment will be added to the movie with the ID 3456 for the author PuzoFan76.

All of the comments for the movie with the ID 3456 will be modified to say, “This is a new comment.”

A new row will be added to the table Review with the MovieId= 3456 and the AuthorName =PuzoFan76.

What are two types of data that benefit from NoSQL data storage? (Choose two.)

data with flexible formats that can change over time

high volumes of unstructured data

data easily organized in tables of columns and rows

data that conforms to a structured schema

form data requiring input validation

What are some best practices when creating tables in SQL?

Normalizing data to reduce redundancy

Using long and descriptive column names

Including NULL values in all columns

Avoiding the use of primary keys

Why is MySQL server administration important for database management?

It optimizes database performance and security

It ensures data is always stored in plaintext format

It guarantees zero downtime during maintenance

It simplifies complex SQL queries

How does MySQL server administration contribute to the scalability and performance of database systems?

By optimizing indexes and query execution plans

By limiting the number of concurrent user connections

By reducing the storage capacity of the database

By disabling caching mechanisms for faster access

Which of the following statements correctly illustrates the usage of the SQL ALTER TABLE command?

ALTER TABLE Customers ADD COLUMN Email VARCHAR(50);

UPDATE TABLE Customers SET Email = ' example@email.com ';

MODIFY TABLE Customers ADD Email VARCHAR(50);

CREATE TABLE Customers MODIFY Email VARCHAR(50);

What is the primary function of the SQL ALTER TABLE command?

To modify the structure of an existing table

To delete existing tables from the database

To insert new records into a table

To perform complex queries on multiple tables

Which option correctly demonstrates using ALTER TABLE to rename a column in SQL?

ALTER TABLE Employees CHANGE COLUMN OldName NewName VARCHAR(50);

ALTER TABLE Employees MODIFY COLUMN OldName TO NewName VARCHAR(50);

ALTER TABLE Employees RENAME COLUMN OldName TO NewName VARCHAR(50)

ALTER TABLE Employees RENAME COLUMN OldName NewName VARCHAR(50);

How does the SQL ALTER TABLE command contribute to database scalability?

It allows for structural changes to be backed up and recovered

It automatically creates backups of modified tables

It is used to restore databases after a failure

It has no direct impact on backup and recovery processes

In terms of SQL best practices, when should the ALTER TABLE command be used?

Whenever modifications to the table structure are necessary

As a primary method for inserting data into a table

Only when deleting columns from a table

Which action can be performed using the ALTER TABLE command to enhance database security?

Adding or removing columns with sensitive information

Encrypting all data in the table

Restricting access to specific rows in the table

Automatically blocking suspicious IP addresses

What precaution should be taken when using the ALTER TABLE command to maintain data integrity?

Ensure there are no active transactions on the table

Always execute the command during peak usage hours

Modify all columns in the table simultaneously

Use it only on tables with a small number of rows

How does the ALTER TABLE command impact database performance?

It can improve performance by optimizing table structure

It significantly slows down query execution

It has no effect on database performance

It increases latency by introducing unnecessary complexity

What is a primary consideration when designing a database table?

Normalizing data to minimize redundancy

Including redundant data to speed up queries

Choosing arbitrary data types for columns

Limiting the number of rows in each table

When creating a new table in SQL, what is the purpose of defining primary keys?

To enforce data uniqueness and provide fast data retrieval

To allow NULL values in the primary key columns

To restrict access to the table

When altering a table, what is a primary consideration to ensure data integrity?

Backing up data before making alterations

Changing column data types frequently

Dropping all constraints before making changes

Performing alterations during peak usage hours

What is the purpose of altering a database table?

To modify the structure or properties of the table

To decrease database performance

Why is MySQL server administration important for database management?

It helps optimize database performance and ensures its availability.

It ensures compatibility with other database management systems.

It automates data entry processes.

It primarily focuses on front-end user interface design.

How does MySQL server administration contribute to data integrity and reliability?

By implementing backup and recovery strategies to prevent data loss.

By encrypting all data stored in the database.

By automatically detecting and correcting errors in data entries.

By providing real-time data analytics tools.

What are the security implications of inadequate MySQL server administration?

Increased risk of unauthorized access, data breaches, and data loss.

Enhanced performance and scalability of the database system.

Improved compatibility with third-party applications.

Better data visualization and reporting capabilities.

How does MySQL server administration contribute to the scalability and performance of database systems?

By implementing techniques such as partitioning and sharding to distribute data and workload efficiently.

By limiting the number of concurrent user connections.

By enforcing strict data validation rules.

By focusing solely on data storage without optimizing query execution.

What is the purpose of locking in MySQL databases?

To ensure data consistency and integrity during concurrent access.

To prevent unauthorized access to the database.

To optimize query performance by caching frequently accessed data.

To automate routine maintenance tasks.

What strategies can be employed to minimize locking contention in a MySQL database?

Optimizing queries to reduce the duration of transactions.

Increasing the number of locks allowed per transaction.

Enforcing strict data validation rules.

Disabling locking mechanisms altogether.

Explain the difference between implicit and explicit locking in MySQL.

Implicit locking is automatically applied by MySQL during data retrieval operations, while explicit locking requires manual commands to lock specific resources.

Implicit locking requires explicit commands to lock resources, while explicit locking is automatically applied by MySQL during data retrieval operations.

Both implicit and explicit locking require manual commands to lock specific resources.

There is no difference between implicit and explicit locking in MySQL.

What are the potential consequences of long-held locks in a MySQL database?

Reduced concurrency and performance degradation.

Improved data consistency and integrity.

Enhanced security against unauthorized access.

Increased scalability and fault tolerance.

How can you use MySQL Workbench to analyze and optimize locking operations in a database?

By analyzing the Performance Schema tables related to locking.

By executing the OPTIMIZE LOCKS command in the SQL Editor.

By configuring custom locking profiles in the Performance Dashboard.

By adjusting the locking settings in the Server Administration section.

SQL & MySQL REVIEW QUIZ

Authored by John Ulakovich

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51 questions

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MULTIPLE SELECT QUESTION

1 min • 3 pts

Which three elements of a relational database are defined in the schema? (Choose 3.)

relationships

attributes

tables

SQL keywords

aliases

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In the SQL statement " SELECT genre FROM movies" what is specified by "genre"?

the table

the column

the database

the folder

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is a flat file database?

a database that stores records in a single file with no hierarchical structure

a database that requires SQL to store, manipulate, and retrieve data

a database that is used to store large amounts of complex data

a database that stores data in a sheet using a hierarchical tabular format of columns and rows

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is used to show how the tables in a database are related to one another?

ERD

CSV

DML

DDL

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which commonly used SQL statement is necessary to retrieve data from one or more tables in a database?

INSERT

TRUNCATE

CREATE

SELECT

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which structure in a table represents an individual record contained in the database?

relationship

row

column

foreign key

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

DISTINCT

ORDER BY

WHERE

FROM

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SQL & MySQL REVIEW QUIZ

Which three elements of a relational database are defined in the schema? (Choose 3.)

In the SQL statement " SELECT genre FROM movies" what is specified by "genre"?

What is a flat file database?

What is used to show how the tables in a database are related to one another?

Which commonly used SQL statement is necessary to retrieve data from one or more tables in a database?

Which structure in a table represents an individual record contained in the database?

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

What is represented by the comma-separated list of items following the SELECT command in this example?

Refer to the exhibit. The exhibit shows the structures of the Drivers and Orders data tables for a pizza delivery service. The same driver may deliver multiple orders on an average day. What type of relationship exists between the Drivers table and the Orders table?

Which two SQL statements are used to create and change a database schema? (Choose two.)

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