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Defining the analysis population: filters, nulls, dates and time zones

Selects exactly the population the question asks about, handling missing values, date and time boundaries, time zones and text matching deliberately, and proves the filtered total reconciles to an independent count.

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SQL for Analysis
Answer real business questions with SQL, from your first query to finding why a number moved.
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Defining the analysis population: filters, nulls, dates and time zones

Paths that teach it

SQL for Analysis

Jobs that use it

Data, Analytics & AI 3

Marketing & Communications 1

Commercial & Sales 1