Welcome to the detailed solution and walkthrough for the SQL challenge 'Count Salary Categories' from LeetCode.
Concepts Covered:
-- UNION Operator: See the UNION operator in action as it combines the results of two distinct select queries while eliminating duplicate rows, useful for merging results from different tables or queries.
Whether you're prepping for interviews or refining your SQL skills, this solution will provide you with practical insights and a clearer understanding of some pivotal SQL techniques.
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