Do not delete the two original data sets, because the report still USES them to populate the joint data set.

不要删除两个原始的数据集，因为表格仍然会使用它们来实现关系数据集。

youdao

Listing 10 shows one approach, which is to bind the "Delete" trigger to a node in the data model, and then to make that node non-relevant when the count of nodes in the set reaches 1.

清单10给出了一种方法，那就是将“删除”触发器绑定到数据模型中的节点上，然后在节点集中的节点数达到1时使该节点变为不相关。

youdao

Depending on the kind of data history that the DBA wants to maintain, this data delete interval should be set.

应该根据DBA希望维护的数据历史类型设置数据删除时间间隔。

youdao

Users can choose to delete data after a set period of time, or pass it on to specific people.

BBC: Press conference in New York

Almost all of the machines ran outdated software with critical security vulnerabilities, and 98% contained data that the company or individual who set up the machine for users had intended to delete but could still be extracted from the machine.

FORBES: Researchers Find Amazon Cloud Servers Teeming With Backdoors And Other People's Data