[单选题]

对于学生信息表:student(sno,shame,sex,age,dept),如果把学生“张明”的姓名改为“张岩”,则正确的语句是

A.UPDATE SET sname='张明'WHERE sname='张岩'

B.UPDATE student SET sname='张明'WHERE sname='张岩'

C.UPDATE student SET sname='张岩'

D.UPDATE student SET sname='张岩'WHERE sname='张明'

参考答案与解析: