Learn how to use the SQL IS NULL Condition to test for a NULL value in SQL. This tutorial explains what a NULL value is and demonstrates how to write a query using the IS NULL Condition with an easy to follow example.
SQL IS NULL Condition (and sample data):
https://www.techonthenet.com/sql/is_n...
SQL Tutorials:
https://www.techonthenet.com/sql/inde...
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