How to Solve Find Customer Referee Problem
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Find Customer Referee
Table: Customer +-------------+---------+ | Column Name | Type | +-------------+---------+ | id | int | | name | varchar | | referee_id | int | +-------------+---------+ In...
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Understanding the Find Customer Referee Problem
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Problem Statement
Table: Customer +-------------+---------+ | Column Name | Type | +-------------+---------+ | id | int | | name | varchar | | referee_id | int | +-------------+---------+ In SQL, id is the primary key column for this table. Each row of this table indicates the id of a customer, their name, and the id of the customer who referred them. Find the names of the customer that are either: referred by any customer with id != 2. not referred by any customer. Return the result table in any order. The result format is in the following example.
Find Customer Referee
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