Exercise: Use a default parameter value to list episodes for a given series

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The answer to the exercise will be included and explained if you attend the Wise Owl course listed below!

Category ==> SQL  (115 exercises)
Topic ==> Parameters and return values  (8 exercises)
Level ==> Average difficulty
Course ==> Advanced SQL
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First (if you haven't already done so) run the script shown above to generate the Doctor Who training database.

Create a stored procedure called spListEpisodes to list out all of the episodes for a given series number.  For example to see the 14 episodes in series 2 you could run this query:

-- show all of the episodes for series 2

spListEpisodes 2

Now set a default value of Null for your parameter, such that it lists out all of the episodes if you don't specify a series number:

-- show all of the episodes


Your WHERE clause should test that either the series number equals the value of the parameter passed, or that the parameter passed is null.

Optionally, save this query as Seriously.sql, then close it down. 

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