Beginners question - making sense of form, item, pane & variable (with relation to where data is stored in the SQL database)

Hi Everyone,

I am new to writing reports (SQL code) for SAP, however I am aware that inside SAP Business One it is necessary to enable System Information (from the View menu) in order to see which tables (and related table attributes / column names) are related to various aspects of the various SAP 'modules' (e.g.: A/R Invoice).

Using an A/R Invoice as an example I can see at the row (or line) level that an item with the description of 'Opening Balance Transfer' is contained in the table INV1, within the attribute (or column) called Dscription.

However not every 'on screen object' shows a table / attribute. For example in the same A/R Invoice if I hover my mouse over the Balance Due field all I see is Form related information.

My question is 'How do I make sense of the Form, Item, Pane, Variable information?', with relation to where data is stored within the SQL database?

Links to online tutorials explaining how this feature of SAP Business One will be much appreciated, along with any personal advice regarding working with this information.

Any (and all) help will be greatly appreciated.

Kind Regards,

David