Take a look at Access HELP ... I thought I understood that Nulls were not
included in the AVG() function calculation.
By the way, are you sure you want to convert a zero (0), which could mean
"none of it" into a Null, which means ... nothing, don't know, didn't
measure, ...?
If you are sure, use an update query to do this ... BUT! first make a
backup of the database file, in case you decide to revert!
Regards
Jeff Boyce
Microsoft Office/Access MVP
sierralightfoot said:
I want to convert a field, in a record, with zero value to a null value:
opposite of nz?
also when using a calculation such as avg=([x]) the null field should not
be
used