I'm writing a maintenance script to tidy up unused customer group tiered prices. How can I programatically get either: All products that have a tiered price for the selected customer group and then delete the tiered price for that group OR Check if a product has a tiered price for the selected customer group and then delete the tiered price for that group.
Bear in mind I don't know the quantity, only the group id so I can't use getTierPrice() as that needs a quantity.
How do I delete the tiered price? Can I just use setTierPrice() and set the price and quantity to 0?