This class usually gets its data from a filesystem directory that contains a certain set of files that follow a certain structure, but it doesn't absolutely have to be a directory.
通常，这个类获取数据是通过一个包含遵循某种结构的某一文件集合的目录，但并不一定是一个目录。
file, on which the administrator can set many parameters that affect ANSI SQL compatibility. All database files (except for text table data files) must be kept in the same directory.
所有数据库文件（文本表数据文件除外）必须放在同一个目录中。
Updates each page of the block so that it appears empty (the physical data remains, but their slot directory entries are set to deleted).
更新块中的每个页，使之看上去为空(物理数据仍然在，但是它们的slot目录项被设为已删除)。
If a connection was not made, check to make sure the network server has been started, and that derby.system.home has been set to the full path to the data directory under the LowFareAir folder.
如果没有成功建立连接，那么检查网络服务器是否已经启动，以及derby . system . home是否被设为LowFareAir文件夹下data目录的完整路径。
The interchange of cryosphere science data, including data set, directory interchange format and samples etc.
就冰冻圈科学数据交换、数据集信息交流及其索引交换格式与样本等问题予以探讨。
The interchange of cryosphere science data, including data set, directory interchange format and samples etc.
就冰冻圈科学数据交换、数据集信息交流及其索引交换格式与样本等问题予以探讨。
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