该元素是基于绑定列的数据类型选择的。

The element is chosen based on the data type of the bound column.

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当创建此扩展时，可以在您的表中以列绑定的形式访问结果。

When you create this extension, you can access the result as a column binding in your table.

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作为默认值，列没有被绑定(图13)。

As the default, no column is bound (Figure 13).

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