// QueryAndChart — year-to-date sales measures
// Paste into Power BI Desktop: Modeling > New measure, one measure at a time.
// Tables: Sales (Month, Category, Units, Revenue), Calendar (Date).
// Relationship: Calendar[Date] (one) to Sales[Month] (many), single direction.
Total Sales = SUM ( Sales[Revenue] )

Sales YTD =
TOTALYTD (
    [Total Sales],
    Calendar[Date]
)

Sales YTD PY =
CALCULATE (
    [Sales YTD],
    SAMEPERIODLASTYEAR ( Calendar[Date] )
)

YTD YoY % Change =
DIVIDE (
    [Sales YTD] - [Sales YTD PY],
    [Sales YTD PY]
)