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)
- Variables (8)
- 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 | Archived exercise | Simple join view of events, then script change
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The answer to the exercise will be included and explained if you attend the relevant Wise Owl course (sadly, only in the UK for now).
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First choose to create a view in the HistoricalEvents database:
You can right-click to create a new view
Design a view to show all of the events occurring in Africa, in date order. As a clue, here is what the top half of the view designer should look like:
You'll need to include these 3 tables
Run your view - it should return 3 events only:
Not much happens in Africa? Or more likely, the database is hopelessly biased
Save this view as vwAfrica, then close it down.
Right-click on the view to script it to a new window.
Change the script in two ways:
- Firstly, so that it creates a new view called vwAfricaAsia, rather than altering the existing one; and
- Secondly, so that it shows the events in Africa or Asia
Run this script, then close down its window.
Refresh your list of views, and run your new vwAfricaAsia view to show that it returns 23 events.