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 (3)
- Stored procedures (5)
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- Parameters and return values (11)
- Testing conditions (1)
- Looping (3)
- Scalar functions (6)
- Transactions (4)
- Creating tables (4)
- Temporary tables and table variables (9)
- Table-valued functions (6)
- Derived tables and CTEs (11)
- Dynamic SQL (4)
- Pivots (2)
- Triggers (2)
- Archived (70)
SQL | Table-valued functions exercise | Use a table-valued function to show episodes for a given doctor
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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 table-valued function to list out all of the episode details for a given doctor. Here's the syntax, as a reminder:
CREATE FUNCTION FunctionName(
-- return data from a single SELECT statement
You should be able to run this query to show the episodes in which anyone called Chris appeared:
-- show the Christopher Eccleston episodes
SELECT * FROM dbo.fnEpisodesByDoctor('Chris')
Here's what this should show:
The first few of the 13 episodes in which Christopher Eccleston appeared.
Create a query based on this (you'll need to give the results returned by the function a table alias, and create a join from this to the tblAuthor table) to show the details (including author) for episodes made by doctors called Chris:
The 13 episodes made by Christopher Eccleston, bringing in the author name from the tblAuthor table.
Optionally, save this query as Episodes by doctor.sql, then close it down.