In MySQL, what does the DESC command do?

Describes the structure of a database table

Disconnects from the MySQL server

Disables constraints in a table

Create table Physics(Name varchar, ID int); This code gives Error, where is mistake?

The data types are not specified

The column names should be in uppercase

What is the primary purpose of the WHERE clause in My SQL?

To filter and retrieve specific records based on specified conditions.

To perform mathematical operations on columns.

To join multiple tables together.

To order the result set in ascending or descending order.

Given the three conditions: NOT FIRST_NAME = "BOLAT"; WHERE FIRST_NAME != "BOLAT"; WHERE FIRST_NAME <> 'BOLAT'; Do all three of these conditions produce the same result when used in a SQL query?

only the 1st and 2nd conditions produce same

only the 2nd and 3rd conditions produce same

all three conditions produce different output.

Identify the mistake in the following SQL query: SELECT customer_id, rental_date FROM rental WHERE rental_date BETWEEN '2005-06-16' AND '2005-06-14';

The mistake is in the WHERE clause.

The mistake is in the SELECT clause.

The mistake is in the FROM clause.

There is no mistake in the query.

SELECT customer_id, rental_date FROM rental WHERE rental_date BETWEEN '2005-06-14' AND '2005-06-16';

There is no mistake in the query.

The mistake is in the SELECT clause.

The mistake is in the FROM clause.

The mistake is in the WHERE clause.

What results will be displayed by the search expression %t in MySQL?

Words ending with the letter 't'

Words starting with the letter 't'

Words containing the letter 't' anywhere

Words containing the letter 't' as the 2nd character

When using the BETWEEN operator in SQL, what is the recommended order for specifying the range limits?

The lower limit firs, the upper limit second

The upper limit first, the lower limit second

Both upper and lower limits can be specified in any order.

The limits should be specified without using the BETWEEN and AND keywords.

What is the primary purpose of a JOIN clause in SQL?

To combine rows from two or more tables based on a related column between them.

To select specific columns from a table.

To sort the result set in ascending or descending order.

To filter rows from a table based on specified conditions.

Why do we use the keyword ON when we join two tables in SQL?

It is for giving connection between two tables

It is to transform data types between tables.

To sort the result set in ascending order.

Select columns_name from table1 left join table2; which table is left table from which we receive all information?

It is for establishing a connection between two tables.

It is a condition to filter data.

It is to transform data types between tables.

To sort the result set in ascending order.

What is the difference between UNION and UNION ALL?

UNION removes duplicate rows from the combined result, while UNION ALL holds all rows, including duplicates.

UNION holds all rows, including duplicates, while UNION ALL removes duplicate rows from the combined result.

Both UNION and UNION ALL remove duplicate rows from the combined result.

Both UNION and UNION ALL maintain all rows, including duplicates.

What is the primary purpose of using the UNION operator?

Join two select statements and display like distinct

Join two select statements and display all data

Join two select statements and display only unique data

Join two select statements and display only data in common

What is the primary purpose of using the UNION ALL operator?

Join two select statements and display all data

Join two select statements and display like distinct

Join two select statements and display only unique data

Join two select statements and display only data in common

What is the primary purpose of using the intersect operator?

Join two select statements and display only data in common

Join two select statements and display all data

Join two select statements and display like distinct

Join two select statements and display only unique data

How to sort your table?

Sort by column_name from table_name

Order by column_name from table_name

SELECT first_name AS fname FROM actor;

A temporary name assigned to the first_name column in the result set.

A condition used to filter rows in the actor table.

An aggregate function applied to the first_name column.

What is the primary purpose of the LENGTH() function in MySQL?

To calculate the total number of characters in a string.

To count the number of rows in a table.

To find the average length of a column in a table.

To determine the number of bytes in a binary column.

What does CONCAT() function do?

Join strings into one string and turn them into string data type

Join strings into one string and turn them into boolean data type

Perform mathematical addition on numeric columns.

Convert a string to uppercase or lowercase

SELECT name LIKE '%y' FROM category; What does this code do?

Retrieves all columns from the category table where the name ends with the letter 'y'.

Check if there are any rows in the category table where the name = '%y'.

Retrieves a boolean value for each row indicating whether the name column ends with the letter 'y'.

Add the string 'y' to the end of the name column for each row in the category table.

SELECT TRUNCATE(72.0909, 1) rounded_number; What will it display?

TRUNCATE function cannot be used like this

Which of the following codes can we use to know the difference between dates in days?

SELECT DATEDIFF('2019-09-01 23:59:59', '2023-12-20 00:00:01');

SELECT EXTRACT(days FROM '2019-09-01 23:59:59') - EXTRACT(days FROM ‘2023-12-20 00:00:01’);

SELECT DATEDIFF(days, '2019-09-01 23:59:59, '2023-12-20 00:00:01');

SELECT TIMEDIFF('2019-09-01 23:59:59', '2023-12-20 00:00:01')

Database final

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MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is MySQL?

All the options are correct

A relational database management system

Cross-platform, open-source and free

Developed, distributed, and supported by Oracle Corporation

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What does SQL stand for?

a. Strong Question Language

a. Structured Question Language

a. Structured Query Language

a. Systematic Query language

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is the primary purpose of a primary key in a MySQL table?

Allowing duplicate values

a. Ensuring data uniqueness

a. Storing large amounts of data

a. None of the above

Answer explanation

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

How do you define a primary key when creating a table?

a. PRIMARY KEY

a. KEY

a. UNIQUE

a. INDEX

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is the main function of a foreign key in MySQL?

a. Ensuring data uniqueness

Linking two tables together

Storing large amounts of data

None of the above

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

How do you establish a foreign key relationship between two tables?

FOREIGN KEY

LINK KEY

CONNECT KEY

RELATE KEY

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

In MySQL, filter out unwanted groups?

Having

Where

Group by

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Database final

What is MySQL?

What does SQL stand for?

What is the primary purpose of a primary key in a MySQL table?

How do you define a primary key when creating a table?

What is the main function of a foreign key in MySQL?

How do you establish a foreign key relationship between two tables?

In MySQL, filter out unwanted groups?

What will be installed first during installing the Sakila database?

mysql -u root -p; What -u stands for?

mysql -u root -p; What -p stands for?

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