For example, if the music product type is declared as a hard type, then there will be a musicproduct database table, and you can define the artist name and release date elements as columns.
例如，如果musicproduct类型被声明为硬类型，那么将创建一个musicproduct数据库表，并且可以定义artistname和releasedate元素作为列。
Reserved extended table field: Pre-define a fixed number of additional data columns in each table with a generic column type (e.g. varchar).
保留的扩展表字段：在每个表中预先定义固定数量的额外数据列，这些列采用通用列类型（比如 varchar）。
In this type of table, you define a primary key column, a MIME type column, and one or more generic columns as BLOB data.
在这种类型的表中，你定义了一个主键列，一个MIME类型列，和一个或多个通用列用来表示BLOB数据。
The UDT introduced into SDM3 is divided into column type and row type. We can define relational table including column type and object table based on row type structure.
首先，拟定了SDM3所支持的UDT分为列类型和行类型两种形式，能建立包含列类型的关系表和基于行类型的对象表。
This type of customization lets you define consistent behavior for any data schema without having to redefine it every time that you add or modify a table.
这种自订型别可让您为任何资料结构描述定义一致性的行为，而无须在每次加入或修改资料表时重新定义自订。
This type of customization lets you define consistent behavior for any data schema without having to redefine it every time that you add or modify a table.
这种自订型别可让您为任何资料结构描述定义一致性的行为，而无须在每次加入或修改资料表时重新定义自订。
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