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Adding new group
Suppose we also need to select orders payed via 'Visa' or 'American Express'. This is a complex filter condition combining two simple conditions with the OR operator. So we cannot just add them at the same root level as for the existing conditions which are combined by an AND operator. Instead, we need to add a group of conditions. This can be done with the help of the Filter box for the SaleDate condition (select the Add Group menu item).
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