Sorry for the delayed response on this. You can definitely add dimensions into a column; you should be able to just drag and drop. If you want to add specific values of a dimension, you can also do that by clicking the arrow to the right of the dimension name in the draggable stack on the left, which will produce a list of values for that dimension. The same is true of the built-in date ranges currently available in the draggable stack; we will be adding custom date ranges very soon, which will give you the ability to define your own date ranges for inclusion in a table, rather than relying on our built-in ones.
You can treat the date ranges in aggregate by not adding a granularity to the table. By default, you will get aggregate data for the date range.