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Example of GROUP BY and COLLECT Operator
Example: Using GROUP BY and COLLECT to obtain C_ER2
SELECT CourseId,
CAST (
COLLECT (ROW (StudentId, Mark))
AS ROW (StudentId SID, Mark INTEGER) MULTISET)
AS ExamResult
FROM EXAM_MARK
GROUP BY CourseId
Explanation
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Example of Using Aggregation on Nested Tables Example: How many students sat each exam WITH C_ER AS (SELECT CourseId, CAST (TABLE (SELECT DISTINCT StudentId, Mark FROM EXAM
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