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Transact SQL Tutorial: SET Commands for Working with NULL values

   Chapter: Commonly Used T-SQL Constructs: Datatypes, Type Conversion, Variables, System Functions and Views and more
Download! Skill Level: 200 (Beginner - Intermediate)
Duration: 8:48
Size: 6.39MB
Versions/Editions Covered: SQL Server 2005 , SQL Server 2008 , SQL Server 2000
Added/Updated: Apr 18, 2006

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Do you know the difference between ANSI NULLS and ANSI NULL DEFAULT (or is there a difference)? If you aren't sure what an "ANSI" is, then you definitely will want to watch this video! If you have trouble with NULLs or just want a good explanation of what NULLs are and how three-valued logic works in relational databases, you'll also want to watch this video.

Highlights from this video:

  • Explanation of NULLs
  • Using SET commands and database options to control how SQL Server works with NULLs
  • Concatentation and arithmetic with NULL values
  • Changing the default behavior with CONCAT_NULL_YIELDS_NULL
  • ISNULL and COALESCE
  • Using "= NULL" and IS NULL
  • Determining SET options with DBCC USEROPTIONS
  • Defaults of SET options, database options and connection options
  • Variable assigment and whether unassigned variables are null, empty or 0
Tags for this video: SET ANSI_NULLS ON OFF  
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This video is part of the following video series: "Transact-SQL SET Commands - An Overview of the Most Commonly Used SET Commands"
What's funny is that most SQL programmers don't even know that there are SET commands to begin with, let alone what they're used for. Want to put yourself ahead of the pack? Watch this series and learn what SET commands are, how they are scoped and lots more good info.
To view all videos in this series, click here

About the Instructor:
Scott Whigham Scott Whigham is the founder of LearnItFirst.com, one of the web's most extensive video training libraries focusing on technical training. Scott is also an experienced consultant, trainer, and author with more than a decade of hands-on experience working with SQL Server databases, writing and debugging applications using Visual Studio, and performance tuning. Scott designed the architecture (websites, class libraries, and database) for the LearnItFirst.com websites and, most re... (Scott Whigham's full bio can be found on the About the Author page)

   
 
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9/8/2008 8:37:42 AM