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

I learned to use windowed functions, types of joins in SQL by adding code

What did you learn from the changes you have made?

I learned usage of many functions like Insert, delet, update, joins and multiple windowed functions

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

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

A couple of questions were pretty tough to understand. I took a help of online SQL guides and chatgpt to understand them.

How were these changes tested?

I teasted all the codes in my raw copy and finalized them whereever I was satisfied with the outcome.

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

Checklist

• I can confirm that my changes are working as intended