BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  need help on designing invoicing system          BorlandTalk.com Forum Index -> C++ Builder Databases (SQL Servers) View previous topic :: View next topic   Author Message Tim Chemaly Guest Posted: Sun May 23, 2004 2:39 pm    Post subject: need help on designing invoicing system Hi I'm busy designing an invoicing system but need some help with the logic I have a CustomerTable, InvoiceTable and InvoiceItemsTable My problem is the PaymentTable does it point to the InvoiceTable or the CustomerTable? For instance: If somepays pay their bill using an invoice it makes sense pointing the PaymentTable to the InvoiceTable But what if he pays two invoices using one payment (such as a cheque) in this case which Invoice should the payment point to? here it makes more sense having the PaymentTable point to the CustomerTable? But now I'm losing the detailed info on which invoice the payment was for! This can be a bad thing because there may be some dispute with a particular invoice in which case the customer doesn't actually want to pay THAT invoice but is willing to pay the others. Having PaymentTable point to CustomerTable mean its impossible to handle such a scenario! An suggestions ? Regards --------------------------------------------------------- Tim Chemaly Back to top Yahia El-Qasem Guest Posted: Sun May 23, 2004 3:20 pm    Post subject: Re: need help on designing invoicing system just an idea : create a PaymentItemTable which points to InvoiceTable... let PaymentTable point to CustomerTable... this should solve all mentioned scenarios... HTH Yahia Back to top Tim Chemaly Guest Posted: Mon May 24, 2004 8:26 am    Post subject: Re: need help on designing invoicing system Hi Yahia I assume PaymentItemTable should point to PaymentTable as well? If not, wouldn't it be better to rename the tables to InvoicePaymentTable (that points to InvoiceTable ) and CustomerPaymentTable that points to CustomerTable? -- Regards --------------------------------------------------------- Tim Chemaly "Yahia El-Qasem" <Yahia.El-Qasem (AT) mgh (DOT) metro-ag.de> wrote Quote: just an idea : create a PaymentItemTable which points to InvoiceTable... let PaymentTable point to CustomerTable... this should solve all mentioned scenarios... HTH Yahia Back to top Yahia El-Qasem Guest Posted: Mon May 24, 2004 4:13 pm    Post subject: Re: need help on designing invoicing system "Tim Chemaly" <tim (AT) brettonwoods (DOT) biz> schrieb im Newsbeitrag news:40b1b1b6 (AT) newsgroups (DOT) borland.com... Quote: Hi Yahia I assume PaymentItemTable should point to PaymentTable as well? 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