Calculate sum of elements.

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AVAILABLE LESSONS:

Lesson 1

Iterations

Lesson 2

Arrays

Lesson 3

Time Complexity

Lesson 4

Counting Elements

Lesson 5

Prefix Sums

Lesson 6

Sorting

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Stacks and Queues

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Leader

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Maximum slice problem

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Prime and composite numbers

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Sieve of Eratosthenes

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Euclidean algorithm

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Fibonacci numbers

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Binary search algorithm

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Caterpillar method

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Greedy algorithms

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Dynamic programming

Lesson 90

Tasks from Indeed Prime 2015 challenge

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Tasks from Indeed Prime 2016 challenge

Lesson 92

Tasks from Indeed Prime 2016 College Coders challenge

Lesson 99

Future training

Programming language:

Given a table `elements` with the following structure:

write an SQL query that returns the sum of the numbers in column `v`.

For example, given:

your query should return 42.

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