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单项选择题将表Teacher中职称字段为"助教"人员改为"讲师",应为()

A、UPDATE Teacher SET职称="助教"WHERE职称="讲师"

B、UPDATE Teacher SET职称="讲师"WHERE职称="助教"

C、UPDATE SET职称="助教"WHERE职称="讲师"FROMTeacher

D、UPDATE SET职称="讲师"WHERE职称="助教"FROMTeacher

  • B
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