How can I restrict the records to be extracted?

You can define a set of filtering conditions the application must perform on an extract data group using the extract data group criteria. You specify the criteria conditions using an expression or fast formula.

You can specify to data group filter as an expression or as fast formula, and you can choose one or both. You can build criteria using the available database items, parameters, and operators (conditional and logical). The filter criteria will be more efficient as it gets appended to the User Entity SQL at the time of execution. If you can't specify the criteria as an expression, then you can place logic inside a fast formula and select here. Fast formulas return values of Y or N to indicate if you must extract the record or not. If both criteria and formula are specified, then both the conditions are applied.