Question

This database will store a list of children. But the problem is, they will have their weight measured once a day. How can I store the changes so I can easily query their actual weight and the weight variation over one day, one week and one month?

Answer 1

I’d think something like the following:

table kid     int pkey(id)     text name  table weight     date when     int kidid fkey(kid.id)     int weight     int pkey(id)