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Question ID 6421

EMPDET is an external table containing the columns EMPNO and ENAME. Which command would work in relation to the EMPDET table?

Option A

UPDATE empdet SET ename = 'Amit' WHERE empno = 1234;

Option B

DELETE FROM empdet WHERE ename LIKE 'J%

Option C

. CREATE VIEW empvu AS SELECT * FROM empdept;

Option D

. CREATE INDEX empdet_idx ON empdet(empno);

Correct Answer D
Explanation


Question ID 6422

In which scenario would you use the ROLLUP operator for expression or columns within a GROUP BY clause?

Option A

to find the groups forming the subtotal in a row

Option B

to create group-wise grand totals for the groups specified within a GROUP BY clause

Option C

to create a grouping for expressions or columns specified within a GROUP BY clause in one direction, from right to left for calculating the subtotals

Option D

. to create a grouping for expressions or columns specified within a GROUP BY clause in all possible directions, which is cross-tabular report for calculating the

Correct Answer C
Explanation

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