Test Cases - for database or for functional testing will be specific to the application/product being tested and for many of us this is proprietary information belonging to the company that we work for.
Also I see that you are a student - are you attempting to complete an assignment with someone else providing the work for you?
You would probably learn more if you asked for feedback on something that you have created yourself.
I have not failed. I've just found 10,000 ways that won't work" --Thomas Edison