多項選擇題

按照學生平均成績(avg_grade)將students表中的數據檢索出來,下面SQL語句正確的是()

A.SELECT*FROM students ORDERBYavg_grade
B.SELECT*FROM students GROUPBYavg_grade ASC
C.SELECT*FROM students ORDERBYavg_grade DESC
D.SELECT*FROM students ORDERbyavg_gradeasc

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