Each column mapping has inputs and outputs. The inputs are columns from the landing table. The outputs are columns in a staging table. You can pass the inputs through a cleanse function that acts on the data. For example, you can standardize data, verify data, or aggregate data. You can also define whether the column mapping as a secure resource or a private resource.

After you configure the column mappings, you run a stage job to populate the staging tables with the source data.