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 | Table variable - C# and Gabriella courses
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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.
The aim of this exercise is to create a table variable holding all of those course ids where the course is either:
- About C#; or
- Given by Gabriella Montez (the techiest trainer).
To do this, first declare a table variable called @TechieCourses to hold one column only - each course's ScheduleId.
Insert into this table all of those courses which have C# in the course name:
These are the two tables you will need to join
Now insert into the same table all those courses where the TrainerIds column contains number 2936 (that's Gabriella). To do this, add a comma to the start and end of each of the things you're comparing:
What your WHERE condition might look like
Create a SELECT statement joining your temporary table to the table of courses to show your results in course date order:
The first of the 72 rows your query should return
Optionally, save this query as Techie courses.sql, then close it down.