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Using Defaults to Avoid Using NULLs in Your Database (SQL Server 2000) - Training Video
   Category: Table Design - Datatypes, Constraints, IDENTITY Columns, Normalization, and More
Download! Skill Level: 200 (Beginner - Intermediate)
Duration: 9:06
Size: 5.07MB
Versions/Editions Covered: SQL Server 2000
Added/Updated: Apr 18, 2006

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There seems to be two camps with respect to database design in SQL Server with respect to NULLs in the database: one group believes that NULLs are unnecessary and should not be allowed in the database while the other sort of shrugs their shoulders and says, "I'll use NULLs if it makes sense to use NULLs."; in other words, they don't go out of their way to avoid NULLs.

This video shows you how you can design your tables so that the columns do not have to allow NULLs using a Gender and Address1/Address2 example.

Highlights from this video:

  • Address schemes in the database
  • DDL syntax for DEFAULT constraints
  • DDL syntax for ALTER TABLE
  • How IDENTITY columns work internally in SQL Server
  • How defaults apply to columns that allow NULLs
Tags for this video: @@identity identity null scope_identity  
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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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8/7/2008 6:19:01 PM