Question: Error Handling in Routines
Explore how to write MySQL stored routines that validate input parameters while handling errors gracefully. Learn to use EXIT handlers, RESIGNAL, and exception propagation to ensure routines respond correctly when passed invalid customer IDs.
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Question
Given the following structure of the Customers table:
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Where, CustomerID is the primary key and ReferralID is self-referencing to CustomerID. The table contains information about customers. In the table, each customer is categorized by a CustomerTier to reflect their engagement level. The possible ...