Exercise: Convert trainer id list into trainer name list

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 Wise Owl course listed below!

Category ==> SQL  (115 exercises)
Topic ==> Temporary tables and table variables  (10 exercises)
Level ==> Harder than average
Course ==> Advanced SQL
Before you can do this exercise, you'll need to download and unzip this file (if you have any problems doing this, click here for help).

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.

If you haven't already done so, run the stored procedure in the above folder to generate a database of training courses and delegates.

Write some sort of query, somehow, which takes in any comma-delimited id string of trainer ids as input:

SQL exercise - Temporary tables and table variables (image 1)

An example of a typical input

Your query should, somehow, turn this into a comma-delimited string of trainer names:

SQL exercise - Temporary tables and table variables (image 2)

What this input would produce

You can use any method you like - the model answer combines a multi-statement table-valued function and a stored procedure, but as with all things SQL there are probably lots of other, better approaches!

Optionally, save your query as Trainer names.sql, then close it down.

This page has 0 threads Add post