WISE OWL EXERCISES
- Simple Queries (4)
- Setting criteria using WHERE (5)
- Calculations (7)
- Calculations using dates (4)
- Basic joins (8)
- More exotic joins (2)
- Aggregation and grouping (8)
- Views (5)
- Subqueries (5)
- Stored procedures (5)
- Variables (8)
- Parameters and return values (11)
- Testing conditions (1)
- Looping (3)
- Scalar functions (6)
- Transactions (5)
- Creating tables (5)
- Temporary tables and table variables (9)
- Table-valued functions (6)
- Derived tables and CTEs (13)
- Dynamic SQL (4)
- Pivots (2)
- Triggers (2)
- Archived (70)
SQL | Parameters and return values exercise | Use a default parameter value to list episodes for a given series
This exercise is provided to allow potential course delegates to choose the correct Wise Owl Microsoft training course, and may not be reproduced in whole or in part in any format without the prior written consent of Wise Owl.
The answer to the exercise will be included and explained if you attend the course listed below!
You need a minimum screen resolution of about 700 pixels width to see our exercises. This is because they contain diagrams and tables which would not be viewable easily on a mobile phone or small laptop. Please use a larger tablet, notebook or desktop computer, or change your screen resolution settings.
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
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.