In this Video, I’ll create a DAX (Data Analysis eXpression) Measure. This measure will be used to calculate the total sales price. Check out this video to see how to create a measure that performs “Aggregation with Iteration”; which is a fancy way of saying DAX needs to calculate the total sales price for each row, then sum it together. Look at the two examples below and you’ll see why.
| Sold | Quantity | Per Item Price (Unit Price) |
| 5 | T-Shirts | $5 per shirt |
| 10 | Stickers | $1 per sticker |
Which is correct to calculate the Total Sales?
15 (sum of the quantity of all items sold) * $6 (sum of Unit Price) = $90 Total Sales
OR
(5 T-Shirts * $5) + (10 Stickers * $1) = $35 Total Sales
DAX can be used in Microsoft Power BI, Microsoft PowerPivot, and MDX. It’s a relatively easy way to model your data.
Today’s DAX Expression:
Extended Price := SUMX(‘Sales Line Items’, ‘Sales Line Items'[Qty] * ‘Sales Line Items'[Unit Price])