Calculate fiscal year in SQL Server

Question

How would you calculate the fiscal year from a date field in a view in SQL Server?

Answer 1

Given @FiscalYearStartMonth is your fiscal year start month (numeric) and @Date is the date in question, do the following:

SELECT 
  CASE 
      WHEN @FiscalYearStartMonth = 1 OR @FiscalYearStartMonth > MONTH(@Date) 
      THEN YEAR(@Date) 
      ELSE YEAR(@Date) + 1 
  END AS FiscalYear

You can abstact this away in a function, or use as a column in a derived view