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Software ==> | SQL (203 exercises) |
Topic ==> | Variables (11 exercises) |
Level ==> | Relatively easy |
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 a 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 file called Declaration of Love.sql from the folder shown above. You'll find two queries to return a list of albums and songs whose titles contain the word love. Run the query to see the results:
It's a popular topic!
Above the first SELECT statement in the script, declare a variable called @NameContains with a data type of NVARCHAR(255). Set the value of this variable to '%love%'.
The simplest syntax to assign an initial value to a variable is:
DECLARE @VariableName DATATYPE = Value
Modify the WHERE clause of each query to refer to the value of the @NameContains variable instead of the text '%love%'.
Execute the script to make sure you see the same results.
Declare another variable according to the following table:
Variable name | Data type | Initial value |
---|---|---|
@ReleasedAfter | DATE | '1964-01-01' |
Modify each query to refer to the value of the new variable then execute the script to check the results are the same.
In between the two SELECT statements, add a SET statement to change the value of the @NameContains variable to '%hate%'.
Execute the script again to see the new results.
It's a thin line between love and whatever.
Try changing the values of the variables to return different results.
All's fair in...
Save the script and then close it.
You can find other training resources for the subject of this exercise here:
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