Exercise: Looping into list variables

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Category ==> SQL  (192 exercises)
Topic ==> Looping  (3 exercises)
Level ==> Harder than average
Course ==> Advanced SQL
Before you can do this exercise, you'll need to download and unzip this file (if you have any problems doing this, click here for help). Once you've done this:
  1. Go into SQL Server Management Studio;
  2. Open the SQL file you've just unzipped (you can press CTRL + O to do this); then
  3. Execute this script.

This will generate the database that you'll need to use in order to do this exercise (note that the database and script are only to be used for exercises published on this website, and may not be reused or distributed in any form without the prior written permission of Wise Owl).

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Ever wondered which month has the most films released? Or which month a film was released in? Create a loop to list the films released in each month, by looping from month number 1 to 12:

Looping through films for each month

Loops can save you time on repetitive tasks (although they can't save you from all these exercises ... ).

The hardest part in creating this query is changing the month number into the month name, as sadly there is no in-built function. Here's one way to achieve this:

DATENAME(MM, '2017-' + CAST(@YourVariable AS VARCHAR(2)) + '-01')

Optionally save this as Automation is the future.sql, then close it down.

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