Statistical analysis systems often include utilities that can "rotate" such data; for example, a "parent" record that includes information about five children can be split into five separate records, each containing (a) the information on one child, and (b) a copy of all the non-child-specific information.
统计分析系统往往包含可以“旋转”这类数据的工具：例如，一条包含5个孩子信息的“父母”记录，可以被分解为5条单独的记录，每条记录包含（a）一个孩子的信息，和（b）一份所有未指定孩子的信息的拷贝。