Hello, I am looking to compare database 1 which contains stocks and corresponding dates, to a second database of stocks with corresponding dates to see if there is any overlapping between them. The idea is that somehow I would create a function that tells me F had overlapping days on 10/5/2010 with table 2 and that AAPL had overlapping days on 11/1/2010 and 11/29/2010. In the attached, data set 3 is how I envision this would look once it returns the data.
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