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Unformatted text preview: mean by view maintenance? Give an example of each of the above concepts. 3. Under what conditions, should we allow null values in a database? How do aggregate functions treat null values? 4. What is referential integrity? Give an example....
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This note was uploaded on 02/23/2012 for the course CS 348 taught by Professor Staff during the Fall '08 term at Purdue.
- Fall '08
- Computer Science