WISE OWL EXERCISES
- Simple Queries (4)
- Setting criteria using WHERE (5)
- Calculations (7)
- Calculations using dates (4)
- Basic joins (8)
- More exotic joins (2)
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- Stored procedures (5)
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- 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 | Derived tables and CTEs exercise | Using derived tables
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The aim of this exercise is to use a derived table to hold data before joining this another table. Start by selecting only events which end with a letter between N and Z.
Your query should return 300 results (including the CountryID column will allow us to join to the tblCountry table).
Now turn this select into a derived table called Second_Half_Derived. The layout will be something like this:
--Your select goes here
) AS Second_half_Derived
Now join tblCountry to the derived table as you would for a normal table:
This should return 230 results - scroll down for some happier events.
Optionally save this as Deriving results.sql and close it down.