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  3. Joining Data with dplyr

Exercise

Joining three tables

You can string together multiple joins with inner_join and the pipe (%>%), both with which you are already very familiar!

We'll now connect sets, a table that tells us about each LEGO kit, with inventories, a table that tells us the specific version of a given set, and finally to inventory_parts, a table which tells us how many of each part is available in each LEGO kit.

So if you were building a Batman LEGO set, sets would tell you the name of the set, inventories would give you IDs for each of the versions of the set, and inventory_parts would tell you how many of each part would be in each version.

Instructions

100 XP
  • Combine the inventories table with the sets table.
  • Next, join the inventory_parts table to the table you created in the previous join by the inventory IDs.