单选题:关于统计函数Count(字符串表达式),下面叙述错误的是(  )。

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题目内容:
关于统计函数Count(字符串表达式),下面叙述错误的是(  )。 A.返回字符表达式中值的个数,即统计记录的个数
B.统计字段应该是数字数据类型
C.字符串表达式中含有字段名
D.以上都不正确

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