SUM(CASE WHEN Attrition IS NULL THEN 1 ELSE 0 END) AS null_attrition, SUM(CASE WHEN MonthlyIncome IS NULL THEN 1 ELSE 0 END) AS null_income, SUM(CASE WHEN OverTime IS NULL THEN 1 ELSE 0 END) AS ...
COUNT(CASE WHEN c.customer_id IS NULL THEN 1 END) AS orphaned_customers, COUNT(CASE WHEN p.product_id IS NULL THEN 1 END) AS orphaned_products, COUNT(CASE WHEN d.date_key IS NULL THEN 1 END) AS ...
Data validation is the process of ensuring that the data you use for analysis, processing, or modeling meets the quality standards and requirements for your purposes. One of the common challenges in ...
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