U.M. (Windows)

Table Of Contents
Using data from related files 10-3
Understanding lookups
You look up data by first setting up a relationship between matching
data in the master file and a related file, and then defining a lookup to
copy data from a field in the related file into a field in the master file.
When you type a value in the match field of the master file,
FileMaker Pro uses the relationship to find the first record in the related
file whose match field contains a matching value. Next, it copies the
value from the lookup source field into the lookup destination field,
where the value is then stored. Data that’s copied into the master file
doesn’t change when the value in the related file changes, unless the
match field in the master file is changed. In that case, the lookup will be
performed again.
Lookup destination field
(for lookups only)
A field in the master file that you want to contain the copied data.
It’s the field the data is copied to.
Relationship An expression you define that contains requirements which, when
met, establish a relationship between values in the match fields. (A
relationship is sometimes called a link or a join expression.)
Related record A record in the related file whose match field (according to the
relationship used) contains a value that’s equal to the value in the
match field of the master file.
Related field A field in the related file that contains data you want to access and
work with in the master file. After a relationship has been
established between data in the match fields, the data in a related
field can then be used in the master file.
You place a related field in a layout of the master file, either by
itself or in a portal. You can then work with the related data in all
modes.
In the master file, a related field name appears as Relationship
name::Related field name or as::Related field name
Portal An object in a layout of the master file in which you can place
related fields. Use a portal when you want to access and work with
data from more than one related record in records of the master
file.
You only need to place related fields in a portal if you want to work
with data from more than one related record.
Portals display data from related records in rows, one record in
each row.
This term Means