What does FIRST_VALUE(revenue) OVER (PARTITION BY region ORDER BY sale_date) return for each row?

SQL Data Analyst Hard

SQL Data Analyst — Hard

What does FIRST_VALUE(revenue) OVER (PARTITION BY region ORDER BY sale_date) return for each row?

Key points

  • The function returns the value of the first row in the partition, not the current row or the most recent sale.
  • It is specifically based on the ordering of sale_date within the region's partition.
  • This function is useful for analyzing trends or patterns in revenue over time within different regions.

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