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1. |
Consider the relation Student (Name, sex, marks), where the primary key is shown underlined, pertaining to students in a class that has at least one boy and one girl. What does the following relational algebra expression produce? (Note: p is the rename operator) name (rsex female (student)) - name (studentsex Po , x , m |
A. | names of girl students with the highest marks |
B. | names of girl students with more marks than some boy student |
C. | names of girl students with marks not less than some boy student |
D. | names of girl students with more marks than all the boy students |
Answer» E. | |