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 | Variables exercise | Use variables to accumulate information about a given doctor
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The answer to the exercise will be included and explained if you attend the course listed below!
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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 variable to hold a given doctor's number (choose between 9, 10, 11 and 12!):
-- a given doctor
DECLARE @DoctorNumber int = 9
The aim of this exercise is to use the SQL PRINT statement to show the following information about the doctor you've chosen:
The details for the doctor we've chosen.
To do tihs, first create a couple of variables and use these to work out the doctor's SQL Server row id number, and his name:
-- get the id number and name of this doctor
DECLARE @DoctorId int
DECLARE @DoctorName varchar(100)
Now create and set another variable to show how many episodes this doctor appeared in:
-- get number of episodes
DECLARE @NumberEpisodes int
You should now be able to print out the required details!
You can use PRINT '' to print a blank separator line.
Optionally, save your query as Doctor details.sql, then close it down.