Update Queries

D

DistrautMan

ok i have an invoice in forms and i need to make an update query to update
each "in stock" value for every item i choose. i choose each item from a
drop down menu that has been requeried from a first drop down menu where i
select the category of the item and then input a quantity to the right of
that in a text box. how i do i create an update query that takes the
quantities for each item thats been selected and subtracts it from the "in
stock" field in it's table? i would prefer a button at the bottom that i
press to run the update and it updates each item on the invoice. please make
it detailed im new to access. thanks for the help.
 
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