Seems like it would be essential to set up the relationship between Recipes and Products so that you cannot delete a product from the product table if the recipe still exists. That does beg the question of what happens if your recipe changes however.
Of course. I assume by the time you're at this level you understand the need for referential integrity - as you obviously do. Obi Wan has taught you well. I'm not going to take the time in every lesson to show you all of the stuff I've already taught you. Again. That's a lowly Expert-level concept. LOL. If the recipe changes, then what you require will also change. If someone changes it AFTER you make your shopping list, well, "dem's the breaks, kid."
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