表1包括字段名称、字段数据类型和注释。

Table 1 consists of field name, field data type and comments.

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字段数据类型？的设置定义了用户可以输入到字段中的值的类型。

Setting a field's data type defines what kind of values you can enter in a field.

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根据字段数据类型，可以对能在该字段中输入的数据设置各种限制。

Depending on the data type of a field, you can set various restrictions on what data can be entered into that field.

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