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Software ==> | SQL (203 exercises) |
Topic ==> | Temporary tables and table variables (13 exercises) |
Level ==> | Average difficulty |
Subject ==> | SQL training |
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.
If you don't have copy of the Music_01 database, follow the instructions at the following link to create it: www.wiseowl.co.uk/sql/exercises/standard/using-sql-server/5257/
Open the Temp Chart Toppers.sql file. You'll find two queries which return the albums and singles which reached number 1 in the charts.
Use a CREATE TABLE statement to create a temporary table called #ChartToppers with columns as shown below:
Column name | Data type |
---|---|
Title | nvarchar(255) |
Artist | nvarchar(255) |
Release_date | date |
US_sales_(m) | float |
Release_type | nvarchar(6) |
If you want to test the script multiple times, you might find it useful to add a statement to drop the temporary table if it exists before creating it.
Use INSERT statements to store the results of the two queries in the temporary table.
Write a query to select everything from the temporary table, sorting the results by the Release_date.
Keep scrolling to find other artists.
Write another query which groups the rows in the temporary table by Artist and Release_type and calculates the aggregate values shown below:
These results are sorted by the Count_releases column.
Save and close the script.
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