The format for the CSV file is simple: the first row contains a list of columnheadings, and the following rows contain the data.
CSV 文件的格式很简单：第一行包含列标题列表，下面的行包含数据。
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A pivot table is a table in which the user can dynamically choose which fields are used as the rowheadings, the column headings, and what is shown as the data in each cell.
Crosstab queries summarize your values and then group them by two sets of facts - one set down the side (rowheadings), and the other across the top (column headings).