How can I create a Field that gets a value from a calculation?

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

SVSnyper - 30 Dec 2005 20:48 GMT

I have created a database, there is two fields Minutes and Hours, I wish the
Hours field to perform a calculation of Minutes/60 and automatically get the
value, how can i achieve this?

Reply to this Message

Rick Brandt - 30 Dec 2005 21:26 GMT

> I have created a database, there is two fields Minutes and Hours, I
> wish the Hours field to perform a calculation of Minutes/60 and
> automatically get the value, how can i achieve this?

Calculations belong in queries, forms, and reports. Not in tables.

Signature

I don't check the Email account attached
to this message. Send instead to...
RBrandt at Hunter dot com

Reply to this Message

John Vinson - 30 Dec 2005 23:56 GMT

>I have created a database, there is two fields Minutes and Hours, I wish the
>Hours field to perform a calculation of Minutes/60 and automatically get the
>value, how can i achieve this?

Storing derived data such as this in your table accomplishes
three things: it wastes disk space; it wastes time (almost
any calculation will be MUCH faster than a disk fetch); and
most importantly, it risks data corruption. If one of the
underlying fields is subsequently edited, you will have data
in your table WHICH IS WRONG, and no automatic way to detect
that fact.

Just redo the calculation whenever you need it, either as a
calculated field in a Query or just as you're now doing it -
in the control source of a Form or a Report textbox.

John W. Vinson[MVP]

Reply to this Message