WHERE statements

When you map data from different operational systems to an entity in your model, the underlying data can sometimes contain data about other things that you want to exclude. In these situations the WHERE clause is useful. Since Daana essentially processes one attribute at a time, these statements can be applied both on source table level and attribute level. Anything that is applied to table level will by default be inherited to the attributes that uses that table, unless you actively say otherwise.

Check out the How Daana Works page for more details on how Daana processes your data.