On the Modeling tab, select Manage relationships > New. On the Modeling tab, select Manage relationships > Autodetect. However, you can still use the Manage relationships dialog box to manually create or edit relationships. If Power BI Desktop can't determine with a high level of confidence there's a match, it doesn't create the relationship. If there are, those relationships are created automatically. Power BI Desktop looks at column names in the tables you're querying to determine if there are any potential relationships. The relationship options Cardinality, Cross filter direction, and Make this relationship active are automatically set. If you query two or more tables at the same time, when the data is loaded, Power BI Desktop attempts to find and create relationships for you. Either way, it’s important to understand relationships in Power BI Desktop and how to create and edit them. ![]() However, sometimes you might have to create relationships yourself, or need to make changes to a relationship. In most cases you won’t have to do anything. Relationships between those tables are necessary to accurately calculate results and display the correct information in your reports. When you have multiple tables, chances are you'll do some analysis using data from all those tables.
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