Learn Standard SQL Functions | Interactive Course | Vertabelo Academy

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31/37 SUM, MAX and MIN – exercise

1. Introduction

2. Table translator

3. Table project

4. Count all rows

5. COUNT with column

6. COUNT(*) vs. COUNT(column) – practice

7. COUNT with expression

8. COUNT DISTINCT

9. COUNT DISTINCT with expression

10. COUNT and GROUP BY

11. COUNT and GROUP BY – additional practice

12. COUNT DISTINCT and GROUP BY

13. COUNT DISTINCT with expression and GROUP BY

14. Common mistake: COUNT(*) and LEFT JOIN

15. COUNT – additional exercise 1

16. COUNT – additional exercise 2

17. Function AVG

18. AVG and GROUP BY

19. AVG and NULLs

20. AVG and NULLs only

21. AVG with COALESCE

22. COALESCE with AVG

23. AVG and DISTINCT

24. ROUND and AVG

25. AVG – additional exercise

26. Function SUM

27. SUM with NULLs only

28. SUM and COALESCE

29. SUM and DISTINCT

30. MAX and MIN

31. SUM, MAX and MIN – exercise

37. Congratulations

Okay. Let's do one more exercise and practice SUM, MAX and MIN together.

For each translator, show their first and last name, followed by:

the sum of the prices for all the projects they have completed (as sum).
the maximum price (as max).
the minimum price (as min).

Make sure that all translators are shown, and if any of these values turns out to be NULL, show 0 instead.

Use a LEFT JOIN to show all translators.

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