Feat: Add test for database

[NancyWei123]

Describe the feature

Test coverage is currently 51%, and database functions are not yet covered.

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[github-actions]

👋 Thanks for opening this issue! The maintainers will review it shortly. Till then, do not open any PR. This is a strict rule we like to follow around here :)

[JITENDRAGAHERWAR03]

Hello 👋
I am interested in working on this issue. I have basic knowledge of Python and I’m eager to learn and contribute. I will try to provide a clean and well-documented solution.
Please assign this issue to me if possible.
Thank you 😊

[rohan-pandeyy]

Hi @NancyWei123 and @JITENDRAGAHERWAR03, thanks for showing interest in improving the db test coverage

Since this is quite a broad area, it would be better to split the work into smaller chunks instead of covering the entire database layer in a single PR.

You both can work on around 3-4 database test cases/files at a time and open separate PRs for them. Once those are reviewed and merged, you can continue with additional coverage afterwards.

Please coordinate here regarding which files/functions each of you plan to cover so we can avoid overlapping work. Do not open PRs without discussing this here.