Update or create a product
Set the price of the product with id=1 in the products table to 15.00. If it does not exist yet, add it: id=1, name Mug, category kitchen, price 15.00, stock 40. The operation must work in both cases — whether the product exists or not.
Díreach INSERT/UPDATE/DELETE — ní gá SELECT ina dhiaidh sin.
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