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Q: "Think of a situation where null value should be allowed and a situation where it should not be allowed. What are the consequences of inappropriate null settings
A: NULL values cause several problems. For starters, NULL values are not the same as data values. A NULL value is basically an undefined values. On the ColdFusion end, this is not terrible as NULL values come across as empty strings (for the most part). [ But in SQL, NULL and empty string are very different and act very differently. Take the following data table for example: id name - - - - - -
- - 1 Ben 2 Jim 3 Simon 4 5 6 Ye 7 8 9 Dave 10 ]
Expert answered|papop|Points 184|
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Asked 8/21/2012 11:16:04 PM
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