Session Ready
Exercise

Checking for duplicate keys

The team is debating whether or not two datasets can be joined. The question comes down to whether or not each data frame has a unique set of one or more key columns.

You'll be going back to two data frames from before, game_matchups and punts. In an earlier exercise you determined there was a one-to-many relationship between the data frames.

Instructions 1/3
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  • View the first 5 rows of game_matchups and check for uniqueness of the key column.
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