SQL | Archived exercise | Count how many people by status - vbls

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 relevant Wise Owl course (sadly, only in the UK for now).

Software ==> SQL  (198 exercises)
Version ==> Any version of SQL Server
Topic ==> Archived  (70 exercises)
Level ==> Average difficulty
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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 tblPersonStatus table contains two rows as follows:

SQL exercise - Variables (image 1)

A person is either current or obsolete!

By linking the tblPerson table to this tblPersonStatus table, create a simple query to show the number of people who still work at their companies:

SQL exercise - Variables (image 2)

A suggestion for what the query could look like

By declaring and using two variables (called @NumberCurrent and @NumberObsolete, perhaps?) create a query to show how many people there are in the database for each of the two statuses (stati?) Current and Obsolete:

SQL exercise - Variables (image 3)

What the result of running your query should look like

Optionally, save this query as Count persons by status.sql, then close it down.

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