This guide explains Excel, SQL, Python, and Power BI. It covers key features, latest trends, and essential skills needed to start or grow a career in data analytics. Excel remains one of the most ...
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ROUND(AVG(Salary) OVER (PARTITION BY Department), 2) AS DeptAvgSalary, ROUND(Salary - AVG(Salary) OVER (PARTITION BY Department), 2) AS DiffFromAvg ...
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