Explain your process for building a monthly reporting package in PostgreSQL. Focus on how you define the reporting month, validate source data, create monthly summaries, handle nulls or late-arriving records, and produce a consistent final output that could feed an IPG Health finance reporting deck.
Using date functions to define a monthly reporting windowApplying aggregations and GROUP BY at the correct grainBasic data wrangling for nulls and inconsistent labelsReconciling outputs before sharing resultsKeep the answer practical and SQL-focused. The interviewer is looking for a repeatable workflow rather than advanced architecture or dashboard design.