A.
SELECT SNO, SUM (GRADE) AS SUM_GRADE FROM SC GROUP BY SNO ORDER BY SUM_GRADE DESC HAVING COUNT(*) >= 4;
B.
SELECT SNO, SUM (GRADE) AS SUM_GRADE FROM SC GROUP BY SNO HAVING COUNT(*)>=4 ORDER BY SUM_GRADE DESC;
C.
SELECT SNO, SUM (GRADE) AS SUM_GRADE FROM SC HAVING COUNT(*)>=4 GROUP BY SNO ORDER BY SUM_GRADE DESC;
D.
SELECT SNO, SUM (GRADE) AS SUM_GRADE FROM SC ORDER BY SUM_GRADE DESC GROUP BY SNO HAVING COUNT(*)>=4;