Question

Once again Im stuck on the same database. This time Im creating an update query that removes 1 of each part in a table when a button is pressed. But when a part is already at 0 it goes to -1. How can I stop this from happening?

I used SQL to achieve this,

UPDATE [ASM-00065 WIP] 
SET [ASM-00065 WIP].[Current Stock] = [ASM-00065 WIP]![Current Stock]-1;

Answer 1

I might be understanding your question incorrectly, but do you want to update all rows in that table for that column, and subtract 1 from them? In that case you can use:

UPDATE [ASM-00065 WIP] 
SET [ASM-00065 WIP].[Current Stock] = [ASM-00065 WIP]![Current Stock]-1 
WHERE [ASM-00065 WIP].[Current Stock] > 0