D. You can pass column names, expressions, constants, or functions as parameters to an aggregate function.

可以将栏位名称, 表达式, 常量或者函数作为参数传递给聚合函数.

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Cannot perform an aggregate function on an expression containing an aggregate or a subquery.

中文说:不能对包含聚合或字查询的表达式执行聚合函数.

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This paper presents a method of query of tables by using aggregate function in SQL.

介绍了在SQL中用聚合函数实现多表查询的一种方法.

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