Creation of sample data in database tool @ sqlserver

I need a database tool where i can easily add information to it.

Example:

I have 2 tables, customers and invoices. The database tool must show me input fields of the custom开发者_如何学编程er and invoices. invoice has a foreign key to customer. The input fields of invoices must have a dropdown where i can select the customer so i won't have to copy paste the ID of the customer.

The tags on your question suggest you may be creating test data. Have you considered a tool like RedGate's Data Generator?

If you want to enter the sample data manually (that's how I understood your question), Microsoft Access sounds like the tool of choice here:

Create a new Access DB and link to the SQL Server tables. Enter the customers directly in Table view. For the invoices, use the wizard to create a form, then create a combobox that references to the customers table.