ENFORM User's Guide

What is a Data Base?
Developing the Data Base
2–2 058058 Tandem Computers Incorporated
Record Occurrences A record occurrence contains the actual data which is retrieved by ENFORM. For
example, consider Figure 2-2 which shows some record occurrences for both parts
and odetail.
Figure -2-2. Sample Record Occurrences
partnum
212
244
1403
2001
Record Occurrences for Parts
partname inventory
System 192KB Core
System 192KB Semi
Proc 96KB Semi
Decimal Arith
7
3
21
–100
location price
J87
B78
A21
X10
92000.00
87000.00
22000.00
1500.00
ordernum
21
21
28
30
Record Occurrences for Odetail
partnum quantity
1
2
3
1
244
2001
1403
212
• • • • • • • • • • • •• • •
• • • • • • • • •
Each parts record occurrence contains the field values that concern a specific part.
Each odetail record occurrence contains the field values that concern a specific order.
Notice that both parts and odetail contain the same field values for partnum. When the
same field values occur in different sets of record occurrences, you can easily establish
a connecting relationship between the record occurrences (even if the fields have
different names). When you establish such a connecting relationship, the process is
called linking. Refer to Section 3 for more information about linking.