Exercise

Add foreign keys to the "affiliations" table

At the moment, the affiliations table has the structure {firstname, lastname, function, organization}, as you can see in the preview at the bottom right. In the next three exercises, you're going to turn this table into the form {professor_id, organization_id, function}, with professor_id and organization_id being foreign keys that point to the respective tables.

You're going to transform the affiliations table in-place, i.e., without creating a temporary table to cache your intermediate results.

Instructions 1/3

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Add a professor_id column with integer data type to affiliations, and declare it to be a foreign key that references the id column in professors.