题目内容：
在查询中要统计记录的个数，应使用的函数是（）
A.SUM
B.COUNT(列名)
C.COUNT（）
D.AVG
参考答案：
选择题：在查询中要统计记录的个数，应使用的函数是（）
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- 题目类型：选择题
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