Question: Students (sid: integer, sname: string) Course (cid: integer, iid, cname: string) Instructors (iid: integer, iname: string) Grades (sid, cid, ggrade: string) The key fields are

Students (sid: integer, sname: string) Course (cid: integer, iid, cname: string)Instructors (iid: integer, iname: string) Grades (sid, cid, ggrade: string) The key

Students (sid: integer, sname: string) Course (cid: integer, iid, cname: string) Instructors (iid: integer, iname: string) Grades (sid, cid, ggrade: string) The key fields are underlined, and the domain of each field is listed after the field name. Thus, sid is the key for Students, cid is the key for Courses, and iid is the key for Instructors. 2. (8 Points) Find the snames of students who got a ggrade "A" in all courses

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