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Not a good one. To my knowledge this actually cannot be done, so my best workaround is to keep two separate Pages documents and when you're done export to PDF and merge the PDFs together with Preview in the way you want
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You can't do it with just one page. The only thing to do is rotate the table.

... If it's for printing this workaround is better than the one I suggested - Could be for digital as well since it's probably faster to rotate a page in Preview than to insert from a separate PDF document
 
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