题目:将所有计算机系学生的年龄增加1岁的正确语句是:
A. UPDATE SET Student.Sage = Student .Sage + 1 WHERE Student.Sdept = 'CS';
B. UPDATE Student SET Sage = Sage + 1 WHERE Sdept = 'CS';
C. UPDATE Student SET Sage + 1 WHERE Sdept = 'CS';
D. UPDATE Student SET Sage += 1 WHERE Sdept = 'CS';
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