In this article, we will focus on one such DAX function called OPENINGBALANCEQUARTER. This function is used to calculate the opening balance for a specified quarter of a year. Let’s take a closer look at how you can use this function in Power BI.
Understanding the OPENINGBALANCEQUARTER Function
Before we dive into the details of how to use this function, let’s first understand what it does. The OPENINGBALANCEQUARTER function returns the opening balance for a specified quarter of a year. The function takes two arguments – the first argument is the expression to be evaluated, and the second argument is a date column.
Here is the syntax of the OPENINGBALANCEQUARTER function:
The function works by evaluating the expression for the first date in the specified quarter and returns the result as the opening balance for that quarter.
Using OPENINGBALANCEQUARTER Function in Power BI
Now that we have a basic understanding of what the function does, let’s see how to use it in Power BI. To use the OPENINGBALANCEQUARTER function, we need to follow these steps:
1. Create a new measure: Start by creating a new measure by clicking on the ‘New Measure’ button in the ‘Modeling’ tab of the Power BI desktop.
2. Define the expression: In the formula bar, define the expression that you want to evaluate. For example, if you want to calculate the opening balance of sales for a specific quarter, you can use the following expression:
Sales Opening Balance = OPENINGBALANCEQUARTER([Total Sales], 'Sales'[Date])
In this expression, ‘Total Sales’ is the name of the column that contains the sales data, and ‘Sales'[Date] is the name of the date column in the ‘Sales’ table.
3. Use the new measure: Once you have defined the new measure, you can use it in your report. For example, you can create a new table that shows the quarter-wise opening balance of sales by dragging the ‘Sales Opening Balance’ measure to the ‘Values’ section of the table.
| Quarter | Sales Opening Balance |
| Q1 | 100,000 |
| Q2 | 120,000 |
| Q3 | 95,000 |
| Q4 | 110,000 |
This table shows the opening balance of sales for each quarter of the year.
Tips for Using the OPENINGBALANCEQUARTER Function
Here are some tips that can help you use the OPENINGBALANCEQUARTER function more effectively:
1. Use a date table: To use the OPENINGBALANCEQUARTER function, you need to have a date column in your dataset. It is recommended to use a dedicated date table that contains a comprehensive list of dates to ensure that the function works correctly.
2. Understand the quarter start date: The opening balance for a quarter is calculated based on the first date in the quarter. It is essential to understand the quarter start date in your dataset to ensure that the function returns the correct results.
3. Use with other DAX functions: The OPENINGBALANCEQUARTER function can be used in combination with other DAX functions to create more complex calculations. For example, you can use the function with the SUMX function to calculate the opening balance for a specific product category.
The OPENINGBALANCEQUARTER function is a powerful tool in Power BI that can help you calculate the opening balance for a specified quarter of a year. By following the steps outlined in this article, you can quickly and easily create a new measure and use it in your reports to gain insights into your data. Remember to use a dedicated date table, understand the quarter start date, and use the function in combination with other DAX functions to create more complex calculations.