Null: Databases for Developers #10

Описание: The null value represents missing or unknown information.

But using it brings complications to your SQL. In this video Chris discusses how to work with null to ensure you get the correct results.

Further reading:
Oracle Database SQL Reference on Nulls: http://docs.oracle.com/database/122/S...

Null related functions: http://docs.oracle.com/database/122/S...

Is null condition: http://docs.oracle.com/database/122/S...

Need help with SQL? Ask us over on AskTOM: https://asktom.oracle.com

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All Things SQL blog: https://blogs.oracle.com/sql/

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The Magic of SQL with Chris Saxon

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