Question: What happens when you try to enter a record into the Customer Service records table for which there is no corresponding record in the Customer

What happens when you try to enter a record into the Customer Service records table for which there is no corresponding record in the Customer table?
What happens when you try to delete a record from the Customer records table for which there is at least one corresponding record in the Customer Service records table?
What happens when you try to change the value of "Customer ID" in the Customer table for which there IS at least one corresponding record in the Customer Service Records table?What happens when you try to enter a record into the Customer Service records table for which there is no corresponding record in the Customer table?
What happens when you try to delete a record from the Customer records table for which there is at least one corresponding record in the Customer Service records table?
What happens when you try to change the value of "Customer ID" in the Customer table for which there IS at least one corresponding record in the Customer Service Records table?

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