I have a social media app with users, posts, and comments, in which users can like posts and comments.

I have a formula that used to work perfectly that now gives me an error that I struggle to understand and that i find weird:

In my project, there is a concept of spaces and subspaces. Using a real-life example, it may be like this: we have one company and it may have many departments

Please tell me about the database design.
Sorry for the very basic question.

I’m trying to create a schema to define products and product bundles/sets.

I’m working on computerizing records for a small independent gym. The gym offers various classes like Yoga, Pilates, and Aerobics. Each class is uniquely identified by 4 attributes.

I’m working on computerizing records for a small independent gym. The gym offers various classes like Yoga, Pilates, and Aerobics. Each class is uniquely identified by 4 attributes. Additionally, each class has a different price or rate, with some popular classes included in the basic monthly membership and others costing extra. Each class is taught by an instructor, and attendance for each class is recorded.

I want to create a database to make it easier to track student progress. I want to upload a roster, click a student’s name, and see the subject areas: Math, Grammar, Social Skills. Under each subject area, I would like to see a list of skills that I can click on or drag & drop into different categories based on mastered or developing and into each grading area. Ideally, I would be able to print out or copy & paste each student’s progress into another document. If the standards are clicked on, I need a way to sort them and want them to disappear from the original list. I see this is where drag & drop has an advantage. Either way, I need to be able to reset the standards at the end of each school year.

Title. As long as the parent table has an attribute, can the child tables have no attributes?

I have hardcoded (a lot of) phrases with some errors. After program did its work, it returns the result that I need to compare with one of the hardcoded phrase and choose the exact same.