下列关于SQL命令的叙述中，正确的是______。
A．INSERT命令中可以没有VALUES关键字
B．INSERT命令中可以没有INTO关键字
C．INSERT命令中必须有SET关键字
D．以上说法均不正确
参考答案：D
解析： SQL查询中的INSERT语句的作用是向数据表中插入数据，其语法结构为：
Insert into表名(列名1，列名2，…，列名n)值(值1，值2，…，值n)；插入多少列，后面括号里面就跟多少值。
从其语法结构可以看出选项A、B、C说法均不正确，故选项D为正确答案。
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