stopping a summary calculation

[Aussie John]

I'd like to stop a summary field calculating when the record is accessed (performance reason) and only summarise when required. Presumably I need a calculation?

Basically I need a field which gives a total of a number field in a found set.

Edited October 28, 2010 by Guest

[comment]

Presumably I need a calculation?

Sounds more like a script to me.