When we talk about transforming your data as well as tidying it up you can also add extra columns to your data and again this will be added as steps and inserted every time you refresh your data. There are three key types of column you can add, Columns By Example, Custom Columns and Conditional Columns.
Columns in Power BI
Columns by Example
This is where you can choose to build extra columns based on existing data following patterns. For example if you have Name and Surname in separate columns and you want to create a combined column showing both.
This allows you to create calculated columns using your existing data. You can give it a name and then build a formula by double clicking on fields in the field list. For example you might have a cost per head and number of people and you want to multiple the two to get a total income figure. As you build the formula it will show at the bottom if it is correct or if you have syntax errors.
Conditional columns allow you to create columns based on conditions in other fields. For example work out the type of travel based on different criteria. You can have multiple conditions and then an otherwise option to cover anything else.
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