Question

I am making a project manager site for my personal use, and I have a question about what would be the best way to build the database for the site.

It will involve Client list, Projects and Tasks, Invoicing and Payments.
I am trying to figure out the best way to make sure I can link all content to the Client.
This is what I put together in notepad just to get an idea on how my database should look like.

Clients: id, name
Projects: id, client, project_name, due_date
Tasks: id, client, project_name, task, due_date, complete
Invoices: invoice_id, client, project_name, date, due, balance, payment, pay_date
Invoice_item: id, item, amount

If anyone has a better idea on how I should do this, please feel free to let me know.

Answer 1

@GuberX – Why do each of the tables have just id?

It would look more descriptive to do something like:

[Client]: cliID, name
[Project]: projID, client, project_name, due_date
[Task]: taskID, client, project_name, task, due_date, complete
[Invoice]: invID, client, project_name, date, due, balance, payment, pay_date
[Invoice_item]: InvItemID, item, amount

An example using the foreign keys you specified (in the comments):

multiple tasks, single invoice but accept multiple payments

Task [taskID, client, project_name, task, due_date, complete, *projID]

Note the *projID above. Further reading for you here