![]() ![]() There are many cases where data needs to be aligned across some common value - whether that’s joining between two different tables in a database or across two data sets stored in a file, or matching data sets between two separate entities.įor example, consider two people - Alice and Bob - who each have a list of contacts identified by email addresses and want to know how many connections they have in common. Matching records is one of the most basic data analysis operations.
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