一个简单的DELETE命令导致DB 2从当前表移除数据，并在历史表中维护一个旧版本，包括已删除数据的结束时间。
A simple delete command causes DB2 to remove the data from the current table and maintain an old version in the history table, including the end time of the deleted data.
这样，可以容易地引入该流程的新版本，旧版本在不再需要时可以容易地删除。
Thus, a new version of this process can be introduced easily and the old version can be removed when it is not needed any more.
在sdiff形式中，源的老版本和旧版本都各在一边显示出来，同时显示的还有两边之间的一列，它能指示是否添加、删除或者更改了行。
In sdiff style, the old and new versions of the source are displayed side-by-side, with a column between them indicating whether the lines were added, deleted, or changed.
它建议您删除，然后再安装新的软件旧版本。
It's recommended that you remove old versions of software before installing the new one.
也许你有一个文件的不同版本，你要找到他们并删除所有旧版本。
Perhaps you have different versions of a file and you want to find all of them and remove the older versions.
也许你有一个文件的不同版本，你要找到他们并删除所有旧版本。
Perhaps you have different versions of a file and you want to find all of them and remove the older versions.
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