DAX stands for Data Analysis Expressions.
DAX, Data Analysis Expressions
DAX is the formula language used in Power BI to create calculations, measures and business logic in reports.
Quick facts about DirectQuery
Formula language
DAX stands for Data Analysis Expressions and is used to create calculations in Power BI data models.
Used for measures
DAX is commonly used to create measures such as revenue, margin, conversion rate or year to date sales.
Adds business logic
It helps define how metrics should be calculated, filtered and reused across reports.
Important for consistency
Clear DAX calculations help teams avoid different versions of the same metric across Power BI reports.
Where DAX adds value in a report
DAX is used when a report needs calculations that go beyond simple fields from a data source. It helps report creators define reusable logic inside the Power BI model, so users can work with consistent metrics. DAX is often used to create:
- Measures
- Calculated columns
- Time based calculations
- Business specific KPIs
This makes DAX important for reports that need trusted calculations. When the same measure is used across several visuals or reports, teams can reduce confusion and make reporting easier to maintain.
The calculation layer behind trusted metrics
A Power BI report can look clear on the surface, but the trust often comes from the calculations behind it. If revenue, margin or retention is defined differently in different reports, users may question which number is correct.
DAX helps teams put that logic into the reporting model, so important metrics can be reused and understood more consistently. Skald BI helps with the delivery side of that work, letting organizations share finished Power BI reports through a secure branded portal for customers, partners and internal teams.
Use cases
See how different types of organisations use Skald BI to share Power BI securely with employees, customers and partners.
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Frequently asked questions
What is DAX used for in Power BI?
DAX is used to create calculations, measures, calculated columns and business logic in Power BI models and reports.
Is DAX the same as Power Query?
No. Power Query is mainly used to connect, clean and transform data before it is loaded. DAX is used to create calculations and analytical logic in the model.
Why is DAX important in reporting?
DAX helps define business metrics consistently, which makes reports easier to trust and maintain.
How does DAX relate to Skald BI?