前导字节指定由它和后面的“尾字节”构成单个双字节宽字符。
A lead byte specifies that it and the following trail byte comprise a single 2-byte-wide character.
在一些平台上, XMLCh 与 C类型 wchar_t 兼容, 后者通常是两个——但是有时是四个——字节宽。
On some platforms it is compatible with the C type wchar_t, which is usually two -- but sometimes four -- bytes wide.
例如,如果有一个页宽为4 KB(4096)的表空间,那么一行的最大大小不能超过4005字节(请参阅参考资料一节,了解关于SQL限制的更多信息)。
For example, if you have a table space with a page size of 4 KB (4096), then the maximum length of a row is restricted to 4005 bytes (see the Resources section for more information on SQL limits).
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