Which of the following is/are correct?
A. An SQL query automatically eliminates duplicates
B. An SQL query will not work if there are no indexes on the relations
C. SQL permits attribute names to be repeated in the same relation
D. one of the above
Answer:B
Which of the following is/are correct?
A. An SQL query automatically eliminates duplicates B. An SQL query will not work if there are no indexes on the relations C. SQL permits attribute names to be repeated in the same relation D. one of the above