Exercise: Create a query joining two tables together, using aliases

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Category ==> SQL  (115 exercises)
Topic ==> Basic joins  (6 exercises)
Level ==> Average difficulty
Course ==> Introduction to SQL
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If you haven't already done so, run the script in the folder above to generate the Doctor Who database.

Each episode in the database has assigned to it the doctor who played the starring role:

Doctor episode link

Each episode is linked to a doctor by the DoctorId column.

Create a join to list out all of the doctors who appeared in episodes made in 2010.  As a help, here's the syntax of an inner join:

-- the syntax of a join

SELECT

-- show columns from either the first table ...

alias1.SomeColumn,

-- ... or the second

alias2.AnotherColumn

FROM

-- decide which will be the main table

FirstTable as alias1

-- link to the second table

INNER JOIN SecondTable as alias2

ON alias1.ColumnName1 = alias2.ColumnName2

Use the year function on the EpisodeDate column to get the year in which each episode took place.

When you run your query, you should see that all but one of the 15 episodes made in this year starred Matt Smith:

2010 episodes

They were both better than Peter Capaldi, that's for sure ...

 

Save your query as David and Matt, then close it down. 

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