Test Your MySQL ORDER BY Knowledge with These Quiz Questions

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True / False

In MySQL, the ORDER BY clause is used to sort the result set in ascending or descending order.

True False

The ORDER BY clause sorts the result set in ascending (default) or descending order using the ASC or DESC keywords.

True / False

By default, MySQL sorts results in descending order when using the ORDER BY clause.

True False

By default, MySQL sorts results in ascending order when using the ORDER BY clause unless specified otherwise.

True / False

MySQL allows sorting by multiple columns in the ORDER BY clause.

True False

You can specify multiple columns to sort by in the ORDER BY clause, and they will be sorted in the order they are listed.

True / False

In MySQL, when using ORDER BY, you can only sort by columns that are part of the SELECT statement.

True False

You can sort by any column in the table, not just those included in the SELECT statement.

True / False

MySQL's ORDER BY clause can be used with aggregate functions such as COUNT and SUM.

True False

You can use aggregate functions in the ORDER BY clause to sort the result set based on the result of those functions.

True / False

In MySQL, ORDER BY can be used with the LIMIT clause to fetch the top N rows in a sorted order.

True False

The ORDER BY clause is often used with LIMIT to fetch a specific number of rows from the sorted result set.

True / False

MySQL does not support sorting by expressions or calculated columns in the ORDER BY clause.

True False

MySQL allows sorting by expressions or calculated columns within the ORDER BY clause.

True / False

When sorting by multiple columns in MySQL, the secondary sort column can have a different sort direction than the primary sort column.

True False

You can specify different sort directions for each column when sorting by multiple columns in MySQL.

True / False

MySQL uses a stable sort algorithm to maintain the relative order of rows with equal sort keys.

True False

MySQL does not guarantee the use of a stable sort algorithm; rows with equal sort keys may not maintain their relative order.

Q10

True / False

In MySQL, using ORDER BY with a BLOB or TEXT column requires specifying the COLLATE clause to define the collation explicitly.

True False

While it may be necessary to specify a collation for correct sorting, it is not a strict requirement. MySQL will use the default collation if one is not explicitly specified.

Q11

Single Choice

Which of the following keywords can be used with MySQL's ORDER BY clause to sort the results in descending order?

ASC DESC DOWNSORT

In MySQL, the DESC keyword is used with ORDER BY to sort the results in descending order, while ASC is used for ascending order.

Q12

Single Choice

What is the default sorting order when you use the ORDER BY clause in MySQL without specifying ASC or DESC?

Random Ascending DescendingNone

By default, MySQL sorts the result set in ascending order when using ORDER BY if neither ASC nor DESC is specified.

Q13

Single Choice

Given the SQL query: SELECT name FROM employees ORDER BY salary;, how will the results be sorted?

By name in ascending order By salary in ascending order By salary in descending orderRandomly

Since no order direction is specified, MySQL will sort the results by salary in ascending order by default.

Q14

Single Choice

Consider the following SQL query: SELECT product_name, price FROM products ORDER BY price DESC, product_name ASC;. What will be the primary sorting criterion?

product_name in ascending order price in descending order price in ascending orderproduct_name in descending order

The results will be sorted first by price in descending order. If there are ties, those rows will be further sorted by product_name in ascending order.

Q15

Single Choice

What will be the result of executing the following query? SELECT name, age FROM students ORDER BY 2 ASC;

Sort by name in ascending order Sort by age in descending order Sort by age in ascending orderThe query will throw an error

MySQL allows sorting by column position, so ORDER BY 2 ASC means sorting by the second column (age) in ascending order.

Q16

Single Choice

Given the query SELECT id, score FROM results ORDER BY score DESC LIMIT 5;, what does the LIMIT clause achieve?

Limits the number of columns returned to 5 Limits the number of rows returned to 5 Limits the number of queries executed to 5No effect with ORDER BY

The LIMIT clause restricts the result set to the specified number of rows, which is 5 in this case, after sorting by score in descending order.

Q17

Single Choice

Consider the query SELECT name, salary FROM employees WHERE salary > 50000 ORDER BY salary DESC, name ASC;. What will be the order of the result set?

Sorted by name in ascending order, then by salary in descending order Sorted by salary in descending order, then by name in ascending order Randomly sortedSorted by salary in ascending order, then by name in descending order

MySQL will first sort the result set by salary in descending order. If multiple employees have the same salary, those rows will then be sorted by name in ascending order.

Q18

Single Choice

What will be the outcome of the query SELECT * FROM orders ORDER BY order_date IS NULL, order_date ASC;?

All NULL values in order_date will be at the bottom, with other dates in ascending order All NULL values in order_date will be at the top, with other dates in ascending order The query will result in an errorAll NULL values in order_date will be removed

The expression order_date IS NULL returns 1 for NULL values and 0 for non-NULL values. MySQL sorts 1 before 0, putting NULL values at the top, followed by other dates in ascending order.

Q19

Single Choice

In MySQL, how does the ORDER BY clause behave when used with the UNION operator as in SELECT id, name FROM table1 UNION SELECT id, name FROM table2 ORDER BY name;?

Orders only the results from table1 Orders only the results from table2 Orders the combined result set from both tablesThe query will throw an error

The ORDER BY clause in a UNION query applies to the combined result set, ordering it based on the specified column across both tables.

Q20

Single Choice

Given the query SELECT department, COUNT(*) AS num_employees FROM employees GROUP BY department ORDER BY num_employees DESC, department ASC;, what will be the order of the result set?

Sorted by department in ascending order, then by num_employees in descending order Sorted by num_employees in descending order, then by department in ascending order Sorted randomlySorted by department in descending order

The results are first sorted by the number of employees (num_employees) in descending order. If there are ties, those departments will be further sorted by department name in ascending order.

Q21

Multiple Choice

Which query correctly sorts the 'employees' table by 'salary' in ascending order?

SQL Code

SELECT *
FROM employees
ORDER BY salary ASC;

SELECT * FROM employees ORDER BY salary ASC; SELECT * FROM employees ORDER BY salary DESC; SELECT salary FROM employees ORDER BY salary;SELECT * FROM employees ORDER BY salary;

The correct query sorts the 'employees' table by the 'salary' column in ascending order using the ORDER BY clause.

Q22

Multiple Choice

Identify the correct SQL query that sorts the 'products' table by 'price' in descending order.

SQL Code

SELECT *
FROM products
ORDER BY price DESC;

SELECT * FROM products ORDER BY price DESC; SELECT * FROM products ORDER BY price ASC; SELECT price FROM products ORDER BY price DESC;SELECT * FROM products ORDER BY price;

The correct query sorts the 'products' table by the 'price' column in descending order using the ORDER BY clause.

Q23

Multiple Choice

Which query sorts the 'orders' table first by 'order_date' in ascending order and then by 'total_amount' in descending order?

SQL Code

SELECT *
FROM orders
ORDER BY order_date ASC, total_amount DESC;

SELECT * FROM orders ORDER BY order_date ASC, total_amount DESC; SELECT * FROM orders ORDER BY total_amount DESC, order_date ASC; SELECT * FROM orders ORDER BY order_date DESC, total_amount ASC;SELECT * FROM orders ORDER BY order_date, total_amount DESC;

The correct query sorts the 'orders' table first by 'order_date' in ascending order and then by 'total_amount' in descending order using the ORDER BY clause.

Q24

Multiple Choice

Determine the correct SQL query that retrieves all rows from the 'customers' table sorted by 'city' in alphabetical order.

SQL Code

SELECT *
FROM customers
ORDER BY city ASC;

SELECT * FROM customers ORDER BY city ASC; SELECT * FROM customers ORDER BY city DESC; SELECT city FROM customers ORDER BY city ASC;SELECT * FROM customers ORDER BY city;

The correct query sorts the 'customers' table by the 'city' column in ascending alphabetical order using the ORDER BY clause.

Q25

Multiple Choice

Which query retrieves the 'inventory' table sorted by 'category' in ascending order and by 'stock' in descending order?

SQL Code

SELECT *
FROM inventory
ORDER BY category ASC, stock DESC;

SELECT * FROM inventory ORDER BY category ASC, stock DESC; SELECT * FROM inventory ORDER BY stock DESC, category ASC; SELECT * FROM inventory ORDER BY category DESC, stock ASC;SELECT * FROM inventory ORDER BY category, stock DESC;

The correct query sorts the 'inventory' table by 'category' in ascending order and by 'stock' in descending order using the ORDER BY clause.

Q26

Multiple Choice

Identify the correct query that sorts the 'employees' table by 'department' in ascending order and by 'hire_date' in descending order.

SQL Code

SELECT *
FROM employees
ORDER BY department ASC, hire_date DESC;

SELECT * FROM employees ORDER BY department ASC, hire_date DESC; SELECT * FROM employees ORDER BY hire_date DESC, department ASC; SELECT * FROM employees ORDER BY department DESC, hire_date ASC;SELECT * FROM employees ORDER BY department ASC;

The correct query sorts the 'employees' table by 'department' in ascending order and by 'hire_date' in descending order using the ORDER BY clause.

Q27

Multiple Choice

Which query correctly sorts the 'sales' table by 'region' in alphabetical order and by 'sales_amount' in ascending order?

SQL Code

SELECT *
FROM sales
ORDER BY region ASC, sales_amount ASC;

SELECT * FROM sales ORDER BY region ASC, sales_amount ASC; SELECT * FROM sales ORDER BY sales_amount ASC, region ASC; SELECT * FROM sales ORDER BY region DESC, sales_amount DESC;SELECT * FROM sales ORDER BY region ASC;

The correct query sorts the 'sales' table by 'region' in alphabetical order and by 'sales_amount' in ascending order using the ORDER BY clause.

Q28

Multiple Choice

Determine the correct SQL query that retrieves all rows from 'products' table sorted by 'category' and then by 'price' in descending order.

SQL Code

SELECT *
FROM products
ORDER BY category, price DESC;

SELECT * FROM products ORDER BY category, price DESC; SELECT * FROM products ORDER BY price DESC, category; SELECT * FROM products ORDER BY category ASC, price DESC;SELECT * FROM products ORDER BY category DESC, price ASC;

The correct query sorts the 'products' table by 'category' and then by 'price' in descending order using the ORDER BY clause.

Q29

Multiple Choice

Which query retrieves the 'projects' table sorted by 'start_date' in ascending order and 'end_date' in descending order?

SQL Code

SELECT *
FROM projects
ORDER BY start_date ASC, end_date DESC;

SELECT * FROM projects ORDER BY start_date ASC, end_date DESC; SELECT * FROM projects ORDER BY end_date DESC, start_date ASC; SELECT * FROM projects ORDER BY start_date DESC, end_date ASC;SELECT * FROM projects ORDER BY start_date ASC, end_date ASC;

The correct query sorts the 'projects' table by 'start_date' in ascending order and 'end_date' in descending order using the ORDER BY clause.

Q30

Multiple Choice

Identify the correct SQL query that retrieves distinct 'employee_id' and 'hire_date' values from the 'employees' table, sorted by 'hire_date' in descending order.

SQL Code

SELECT DISTINCT employee_id, hire_date
FROM employees
ORDER BY hire_date DESC;

SELECT DISTINCT employee_id, hire_date FROM employees ORDER BY hire_date DESC; SELECT employee_id, hire_date FROM employees ORDER BY hire_date DESC; SELECT DISTINCT hire_date FROM employees ORDER BY hire_date DESC;SELECT DISTINCT employee_id, hire_date FROM employees ORDER BY hire_date ASC;

The correct query retrieves distinct 'employee_id' and 'hire_date' values, sorted by 'hire_date' in descending order using the ORDER BY clause.

MySQL Database Quiz Questions