That's a nice improvement over working with XML data as CLOBs or VARCHARs, which require maximum lengths.
与将XML数据作为CLOB或VARCHAR处理(这需要指定最大长度)相比，这是一项不错的改进。
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At these times of the year, the sun appears to be directly over Earth's equator, and the lengths of the day and the night are equal over most of the planet.
As another example, cosmic rays have a wavelength of lessthan a millionth of a millionth of an inch, while some radio waves have wave lengths of over a mile!