In the next part of this series of articles, you will see more examples of user-defined data types.

在此系列文章的下一部分，您会学习更多的用户定义数据类型示例。

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Finally, I briefly covered the topic of user-defined data types, which is an advanced topic that needs detailed study.

最后，我简述了用户定义数据类型的主题，它是一个需要我们仔细学习的高级主题。

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You can use the system catalog views to easily retrieve information about user-defined data types or routines. For example

可以使用系统编目视图来轻松地检索关于用户定义数据类型或例程的信息。

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