SQL Server Course for Beginners with 100+ examples - FOREIGN KEY Constraint

The video tutorial explains the NOT NULL constraint in SQL, which ensures that a column cannot have null values. It demonstrates how to create a table with NOT NULL fields and insert data into it, highlighting the importance of NOT NULL in maintaining data integrity. The tutorial uses an example of an employee table to illustrate these concepts.

What fields were included in the example employee table, and which of them were set as NOT NULL?

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How can you verify that records in a table adhere to the NOT NULL constraint?

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