Q
What is ROWNUM in Oracle?
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A
A column storing the physical row address permanently
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B
A pseudo-column that numbers rows in the order they are returned
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C
A function returning row count
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D
A table constraint
Correct Answer:
B. A pseudo-column that numbers rows in the order they are returned
Explanation:
ROWNUM is assigned as rows are fetched, starting at 1. ROWID is the physical address of a row.