This method reveals more of the mechanics of calculating a running total than using PARTITION. We’ll first calculate the running total using INNER JOINs. The Running Total for Invoice 3, is the prior RunningTotal of 3110.75 plus the Invoice 3’s Transaction Amount of 103.50.Ĭalculate A Running Total in SQL using an INNER JOIN You can see this in action in the following example. For each subsequent invoice within the transaction date, the RunningTotal should equal the prior InvoiceID’s running total plus the current TransactionAmount. Our goal is to calculate a running total that resets whenever the TransactionDate changes.

You can get started using these free tools using my Guide Get Started Using SQL Server 2016. This method is newer and more concise to use.Īll the examples for this lesson are based on Microsoft SQL Server Management Studio and the WideWorldImporters database. Once you’ve seen how to do it “old school,” we’ll use the OVER clause to calculate running totals using a window function. By doing so, you’ll not only learn more about join conditions, but see how to take the result and summarize it, to get the running total. We’ll first look at how to calculate the running total using an INNER JOIN. In this article, we will cover two methods: Joins, and Window Functions. There are several ways to calculate a running total in SQL.

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