Create an instead of trigger that handles update grade table

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Reference no: EM131986127

Problem

Create an Instead of trigger that handles Updates and Inserts to the Grade table by adding the values for CREATED_BY, CREATED_DATE, MODIFIED_BY, and MODIFIED_DATE for Inserts and updating the last two items for updates. Also, verify that the STUDENT_ID, SECTION_ID, and GRADE_TYPE_CODEs are legal and, if not, raise an error.

Reference no: EM131986127

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