The document provides an overview of SQL training related to aggregation functions that are used with the 'group by' command following a 'where' statement. It emphasizes the necessity for unaggregated fields in the select statement to be included in the group by clause. Additionally, it includes references to table formatting and examples related to SQL commands.

1. SQL Training

3. …

4. 





5. SQL Training

6. 



7. 7

8. 8
1 32

9. 9

10. 10

11. 11

12. 12

13. Note: the 7 first functions on the left hand side are aggregation functions and run only with the “group by” command which comes after the where
statement.
All the fields in the select statement which aren’t aggregated needs to figure in the group by statement
13

14. 14

15. 15
  

16. 𝐻𝑒𝑖𝑔ℎ𝑡2

17. 17

19. 










20. 20

22. 22

23. 

24. 
T
a
b
l
e
1
T
a
b
l
e
2
T
a
b
l
e
1
T
a
b
l
e
2
T
a
b
l
e
1
T
a
b
l
e
2
T
a
b
l
e
1
T
a
b
l
e
2

25. 

26. 

27. 