• 2022-05-29
    查看表MARKS结构,哪个SQL语句能执行成功()
    A: SELEC
    B: student_name,subject1.FRO
    C: marks.WHERE-subject1>AVG(subject1)
    D: SELEC
    E: student_name,SUM(subject1)FRO
    F: marks.WHERE-student_name-LIKE’R%’
    G: SELEC
    H: SUM(subject1+subject2+subject3)FRO
    I: marks.WHERE-student_name-ISNULL
    J: SELEC
    K: SUM(DISTINC
    L: NVL(subject1,0)),MAX(subject1)FRO
    M: mark.sWHERE-subject1>subject2