davidbodhi
Davidbodhi
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- Joined
- Jul 6, 2005
- Messages
- 79
I am building an application for a small clinic. In the interests of good database design, I don't want to be storing numbers that are derived by calculation.
A patient with insurance will have a deductable that will be entered into a field on their first (ms access) transaction form.
A calculation will put the remaining deductable into another field. No problem.
However, the NEXT visit has to look back to find previous transaction records, again perform the initial calculation and then perform another for this transaction, and again the next time and the next until the deductable reaches zero.
Additionally, since I'm not storing these values, if I pull up an old transaction form, that form has to re-perform the calculation ONLY on transactions from that date and earlier. It must not reflect visits that took place later.
So, this field must query tblTransactions, filtered by the name of the patient (a combo box called tblTransactions.Patient_Name that looks at tblContacts), the transaction date/time (stored in two date/time fields, cleverly named tblTransactions.Date and tblTransactions.Time), and the total deductable value stored in a field called tblTransactions.Deductable.
As someone who has never coded anything more complicated than DOS batch files, I'm at somewhat of a loss as to how to go about this.
Any assistance, code-wise and which Property value to put it in would be MOST appreciated.
A patient with insurance will have a deductable that will be entered into a field on their first (ms access) transaction form.
A calculation will put the remaining deductable into another field. No problem.
However, the NEXT visit has to look back to find previous transaction records, again perform the initial calculation and then perform another for this transaction, and again the next time and the next until the deductable reaches zero.
Additionally, since I'm not storing these values, if I pull up an old transaction form, that form has to re-perform the calculation ONLY on transactions from that date and earlier. It must not reflect visits that took place later.
So, this field must query tblTransactions, filtered by the name of the patient (a combo box called tblTransactions.Patient_Name that looks at tblContacts), the transaction date/time (stored in two date/time fields, cleverly named tblTransactions.Date and tblTransactions.Time), and the total deductable value stored in a field called tblTransactions.Deductable.
As someone who has never coded anything more complicated than DOS batch files, I'm at somewhat of a loss as to how to go about this.
Any assistance, code-wise and which Property value to put it in would be MOST appreciated.
