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Working With Columns That Contain Null Values
What is a NULL? Does it have a value of zero, space or something else? Gregory Larsen discusses NULLs, some programming issues to be aware of when working with nulls, and some different techniques that can be used when dealing with nulls.
This story continues at http://www.databasejournal.com/featu...le.php/3399931
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Thanks,
Linda
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