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Suppose I have 2 datawarehouses of two different companies that are being merged. Some of the tables are common but includes different records, while others are different. If I use big data environments, can I put all the tables together as data swamp and to create new data lake with archive of the previous datawarehouses data or should I build a new datawarehouse based on the common tables and adding the different ones? In addition, is there a good source for best practice steps for merging datawarehouses?

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