What is the best way to join 2 records in Pascal?

I've a little problem with records in Pascal. I'm writting a program where I've got two lists of records: one with patients and second with diseases but I don't have idea how to join it. I was trying to do a dynamic table with diseases id's in patient list but lazarus had problems with compilin开发者_如何学运维g it. I would be glad if someone helps me.

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One patient can have many diseases, and many patients can have one disease.

If records about patients describe patients (e.g. Date of Birth) and records about diseases describe diseases (e.g. incidence of fatality) then you need a third list of records about each patient's history with each disease (e.g. date of recovery).

It's not hard to link this third list of records back to patients, using patientid as the guide, and back to diseases, using diseaseid as the guide.

Now you have to do a three way join in order to get all the related information together.

If I had to do this I would use SQL rather than Pascal. But then there's the overhead of uisng a database.