If we present our data in the JTable, users can choose a custom perspective to suit their informational needs by changing the horizontal and vertical data sets.
如果我们在JTable中显示数据，用户就可以更改水平和垂直的数据集，从而根据自己的信息需求选择定制的透视图。
To add data sets to the project, select the data sets, right-click the highlighted data sets, and choose add to project..., as shown in Figure 27.
要将数据集添加到项目中，请选择这些数据集，右击突出显示的数据集，选择add to Project…，如图27所示。
To create data sets, we must choose a data source because different information can be derived from different snapshots.
为了创建数据集，我们必须选择一个数据源，因为不同的信息可以从不同的快照中获得。
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