I completed assignment 2 for sql.

[SihanHe97]

What changes are you trying to make? (e.g. Adding or removing code, refactoring existing code, adding reports)

I changed the assignment_2.sql and tested all codes in it. I included the logical models as instructed in assignment_2.md. I added writing pieces into assignment_2.md per instructions.

What did you learn from the changes you have made?

sql code has many differences from python code.

Was there another approach you were thinking about making? If so, what approach(es) were you thinking of?

I was thinking some tasks might be easier operated in python codes. Maybe database allows for better and more efficient visualizations of the data.

Were there any challenges? If so, what issue(s) did you face? How did you overcome it?

Debugging in sql can be challenging sometimes (compared to python).

How were these changes tested?

I used 'select * from my_table' to display the results and ensured the code produced the expected output.

A reference to a related issue in your repository (if applicable)

Checklist

• [yes] I can confirm that my changes are working as intended

[khsergvl]

Thank you for submitting assignment 2.
Mark: 70/70