the issue and cannot be put aside. Code
is the proper minimum building technique.
What you are suggesting is not only structurally unsound, it is foolish.
An attached deck requires a full footing, otherwise lifting of the slab and hence the deck from soil freezing and thawing and soil settling from the added weight can cause the deck to pull out from the house risking collapse.
A raised deck also has to be properly secured vertically against wind loads which can lift the deck like a wing in a severe storm and rip it from the house.
Without proper footings, your deck is prone to fail and you put at risk anyone who uses it.
You cannot achieve these things by installing it on a slab.
Do it right or don't bother to ask us how to help you to do it WRONG.