https://leetcode.com/problems/count-salary-categories/description/?envType=study-plan-v2&envId=top-sql-50 Count Salary Categories - LeetCode Can you solve this real interview question? Count Salary Categories - Table: Accounts +-------------+------+ | Column Name | Type | +-------------+------+ | account_id | int | | income | int | +-------------+------+ account_id is the primary key (column wi ..