FileMaker Pro 4.1 Mac User's Guide

10-4 FileMaker Pro User’s Guide
Lookup destination field
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.
After a value is copied into the lookup destination field, you can edit,
replace, or delete it like any other value. You can also update data in the
master file to match data that changed in the related file. (See “Updating
lookup values” on page 10-14.)
Client ID
Name
Match fields for the relationship
C200
Turkoglu
Master file
Lookup source field
Client ID C235
Name Durand
Client ID C100
Phone 42.83.91.04
Name Burke
City Paris
Client ID C200 Phone 408-555-3456
Name Turkoglu City San Jose
Phone 123-45-67
City Istanbul
Related file
Keep these points in mind:
1 When the same value exists in more than one match field in the related
file, FileMaker Pro copies data from only the first related record.
1 When you type data in the match field of the master file, you might
be asked to type a password for the related file.
1 To copy data into a second field that uses the same match fields—for
example, to copy a name and telephone number based on a matching
client identification number—define a lookup for the second field,
and use the same relationship as the first field.