The Data is dense option appears when you select Based on dimensions. Select this option only if all the logical table sources to which this column is mapped are dense.
Caution:Selecting Data is dense indicates that all sources to which this column is mapped have a row for every combination of dimension levels that they represent. Selecting this option when any table source that is used by this column does not contain dense data will return incorrect results.
当你选择“基于维”时,“数据紧密”选项出现。仅仅在此列映射的所有逻辑表源都是紧密时,选中此项。
注意:选中“数据紧密”表明此列映射的所有源有一行代表每种维度层级的组合。选中此项时,如果此列使用的任何表源没有包含紧密数据,将会返回不正确结果。