FileMaker Pro 4.1 Mac User's Guide

C-8 FileMaker Pro User’s Guide
1 The parameters field1, field2,... can include a numeric constant (for
example, 10). A constant in a formula for a repeating field affects the
result for every repetition.
1 When field1, field2,... includes a nonrepeating field, that value is used
in the result for only the first repetition unless you use the Extend
function. For information about the Extend function, see “Repeating
functions” on page C-12.
1 Empty (null) values are ignored.
1 If you specify a single parameter (field) or (relationship::field), the
result includes all nonblank values in all repetitions. When the
calculation is also repeating, the result is returned in the first
repetition.
1 When field1, field2,... are repeating and the calculation result is not
repeating, only the values from the first repetition of the repeating
fields are used to calculate the result. If the calculation result field is
also repeating, FileMaker Pro uses the corresponding repetitions of
the fields to calculate the result.
1 Values in repetitions that exceed the number of repetitions in the
calculated field are ignored. For example, a calculated field with three
repetitions holds only three results, even when one field in the
calculation has five repetitions.
The following examples show how aggregate functions produce results
based on the number of parameters and whether the calculations involve
repeating or nonrepeating fields.