What is one of the primary purposes of a data transform in Pega?

A data transform in Pega is primarily used to set property values on a given page. This enables the manipulation and initialization of data within the Pega application. By using data transforms, developers can map values from one property to another, perform value transformations, and set default values for properties in various circumstances—such as upon the creation of a new case or when data is being retrieved from an external source.

In the Pega environment, data transforms facilitate efficient data handling and maintenance, allowing for the automation of setting values without needing to write extensive amounts of code. This makes it easier to manage data flow and structure within the application's context.

The other options do not align with the primary function of data transforms. For instance, while calculations on numerical data can be a part of the data transform process, it is not the exclusive or primary purpose. Storing data from a SQL query is more relevant to data sources rather than a data transform, and defining user interface layouts pertains to other design elements in Pega, such as sections and layouts, rather than data transforms. Therefore, the option regarding setting property values accurately reflects the main purpose of a data transform in Pega.