WISE OWL EXERCISES
SQL EXERCISES
SQL 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 (5)
- Stored procedures (5)
- Variables (8)
- 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 | Variables exercise | Use variables to accumulate information about a given doctor
This exercise is provided to allow potential course delegates to choose the correct Wise Owl Microsoft training course, and may not be reproduced in whole or in part in any format without the prior written consent of Wise Owl.
The answer to the exercise will be included and explained if you attend the course listed below!
| Software ==> | SQL (198 exercises) |
| Version ==> | Any version of SQL Server |
| Topic ==> | Variables (8 exercises) |
| Level ==> | Harder than average |
| Course ==> | Advanced SQL |
You need a minimum screen resolution of about 700 pixels width to see our exercises. This is because they contain diagrams and tables which would not be viewable easily on a mobile phone or small laptop. Please use a larger tablet, notebook or desktop computer, or change your screen resolution settings.
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.