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1. How can a sequence be used in a database? 2. How can gaps appear in values generated by a sequence? 3. How can you

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1. How can a sequence be used in a database? 2. How can gaps appear in values generated by a sequence? 3. How can you indicate that the values generated by a sequence should be in descending order? 4. When is an index appropriate for a table? 5. What is the difference between the B-tree and bitmap index structures

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