Exercise

Checking for differences

When joining two data sources together, it's important to look for differences in the keys. Without this, you can get far more rows in your joins than you were expecting. You saw some results that seemed a little off with our joins earlier in this chapter. In this exercise, you'll explore some reasons for those issues.

world_bank_data and imf_data have been loaded for you.

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Determine the distinct() country names and their ISO codes in the imf_data and also in the world_bank_data.