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Exercise

Migrate data with INSERT INTO SELECT DISTINCT

Now it's finally time to migrate the data into the new tables. You'll use the following pattern: 

INSERT INTO ... 
SELECT DISTINCT ... 
FROM ...;

It can be broken up into two parts:

First part:

SELECT DISTINCT column_name1, column_name2, ... 
FROM table_a;

This selects all distinct values in table table_a – nothing new for you.

Second part:

INSERT INTO table_b ...;

Take this part and append it to the first, so it inserts all distinct rows from table_a into table_b.

One last thing: It is important that you run all of the code at the same time once you have filled out the blanks.

Instructions 1/2

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  • 1
    • Insert all DISTINCT professors from university_professors into professors.
    • Print all the rows in professors.
  • 2

    Insert all DISTINCT affiliations into affiliations from university_professors.