WISE OWL EXERCISES
- Simple Queries (4)
- Setting criteria using WHERE (5)
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- Calculations using dates (4)
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- Stored procedures (5)
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- Transactions (5)
- Creating tables (5)
- Temporary tables and table variables (9)
- Table-valued functions (6)
- Derived tables and CTEs (13)
- Dynamic SQL (4)
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- Triggers (2)
- Archived (70)
SQL | Archived exercise | Function to get courses for given resource name
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If you haven't already done so, run the stored procedure in the above folder to generate a database of training courses and delegates.
Create a multi-statement table-valued function (!) called fnCoursesForResources which - given a particular resource name - will return a table of courses which use that resource. Here's how this should work:
You can call the function with different resource names, to get different results
You may find it helpful to declare an integer variable called @ResourceId, and set this to hold the ID of the resource corresponding to the name passed in as an argument. You can then test to see if this equals null (which would mean the resource didn't exist).
Here are the first 3 of the 79 rows the function should return for a Projector:
This assumes you sort the data by course start date
Optionally, save this query as Courses for horses.sql, then close it down.