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The SUM() Function | Aggregate Functions
Introduction to SQL
course content

Course Content

Introduction to SQL

Introduction to SQL

1. Retrieving Data
2. Sorting Retrieved Data
3. Filtering Data
4. Advanced Data Filtering
5. Aggregate Functions

bookThe SUM() Function

SUM() - This function returns the sum of the values in a specific column. Let's take a look at the example:

123
SELECT SUM(population) FROM country WHERE continent='Asia';
copy

Explanation: The SUM() function returns the sum of the population of all countries in Asia from the country table.

Task

Write an SQL query that returns the sum of the surfacearea of countries from 'Europe'.

Here's a short example of the country table:

idnamecontinentregionsurfaceareacapitalpopulation
1JapanAsiaEastern Asia377829Tokyo126714000
2LatviaEuropeNULL64589Riga2424200
3MexicoNorth AmericaCentral America1958201Mexico City98881000
.....................
15MaltaEuropeSouthern Europe316Valletta380200

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Section 5. Chapter 8
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bookThe SUM() Function

SUM() - This function returns the sum of the values in a specific column. Let's take a look at the example:

123
SELECT SUM(population) FROM country WHERE continent='Asia';
copy

Explanation: The SUM() function returns the sum of the population of all countries in Asia from the country table.

Task

Write an SQL query that returns the sum of the surfacearea of countries from 'Europe'.

Here's a short example of the country table:

idnamecontinentregionsurfaceareacapitalpopulation
1JapanAsiaEastern Asia377829Tokyo126714000
2LatviaEuropeNULL64589Riga2424200
3MexicoNorth AmericaCentral America1958201Mexico City98881000
.....................
15MaltaEuropeSouthern Europe316Valletta380200

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 5. Chapter 8
toggle bottom row

bookThe SUM() Function

SUM() - This function returns the sum of the values in a specific column. Let's take a look at the example:

123
SELECT SUM(population) FROM country WHERE continent='Asia';
copy

Explanation: The SUM() function returns the sum of the population of all countries in Asia from the country table.

Task

Write an SQL query that returns the sum of the surfacearea of countries from 'Europe'.

Here's a short example of the country table:

idnamecontinentregionsurfaceareacapitalpopulation
1JapanAsiaEastern Asia377829Tokyo126714000
2LatviaEuropeNULL64589Riga2424200
3MexicoNorth AmericaCentral America1958201Mexico City98881000
.....................
15MaltaEuropeSouthern Europe316Valletta380200

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

SUM() - This function returns the sum of the values in a specific column. Let's take a look at the example:

123
SELECT SUM(population) FROM country WHERE continent='Asia';
copy

Explanation: The SUM() function returns the sum of the population of all countries in Asia from the country table.

Task

Write an SQL query that returns the sum of the surfacearea of countries from 'Europe'.

Here's a short example of the country table:

idnamecontinentregionsurfaceareacapitalpopulation
1JapanAsiaEastern Asia377829Tokyo126714000
2LatviaEuropeNULL64589Riga2424200
3MexicoNorth AmericaCentral America1958201Mexico City98881000
.....................
15MaltaEuropeSouthern Europe316Valletta380200

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 5. Chapter 8
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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