The U.S.Census Bureau's "Summary Tape Files" contain aggregate data and consist of totals of individuals with various specified attributes in a particular geographic area. 美國普查局之磁帶檔案概要的總體數據，是由與地域有關(guān)之所有人的特質(zhì)數據組成，可說(shuō)是所有數據的一覽表。
Aggregate functions are used to summarize all the data in a table. 聚合函數用于匯總表中的所有數據。
Before the position summary tables we include summaries of Base Pay and Total Cash. 在崗位匯總表之前，包含有基本薪酬和總現金薪酬的概要。
