外部表特性提供了一种简单直观的方法来通过SQL界面或存储过程执行加载和卸载操作。
External tables provide an easy and intuitive way to perform the unload and load operations through the SQL interface or stored procedures.
大多数数据加密方法需要对在什么地方与什么时候对数据进行加密作出明确的决策、手动装入和卸载加密的映像，并输入相应的密码。
Most data encryption methods require explicit decisions of where and when to encrypt data, manual mounting and unmounting of encrypted images, and entering passwords.
Drupal 5.0 现在实现了卸载模块的方法，从而能够清理数据库。
Drupal 5.0 now implements methods to uninstall modules so that the database can be cleaned up.
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