When ON delete set NULL is active, when a record is deleted from the parent table, all records in the child table with matching foreign key values are set to NULL.
当ON DELETE SETNULL规则被激活时，如果一条记录从父表中删除，子表中的所有记录以及匹配的外键值都被设置为NULL。
However, you can watch the error occur if you delete the previous two breakpoints and set a new breakpoint at line 4.
如果删除原来的两个断点并在第4行上设置一个新断点，就可以看到这个错误是如何发生的。
A user can assign an activity or a to-do to any user, set priority, or delete the activity when the activity is over.
一个用户可以为任何用户分配一个活动或任务、设置优先级，或者在活动结束后删除该活动。
This method takes three parameters, the primary key, the action performed on the table (create, update, delete) and a result set.
此方法具有三个参数，主键、对表执行的操作(创建、更新、删除)和结果集。
Delete all result set columns except those required by the target table.
删除目标表不需要的所有结果集列。
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。
The first main COBOL program performs the standard CRUD (Create, Read, Update, Delete), operations set, acting on a single record.
第一个主cobol程序执行标准的CRUD(创建、读取、更新、删除)、操作集合，并对单个记录进行操作。
Our application will let us add photos to a set or delete the photos, all using drag and drop metaphors.
我们的应用程序允许通过拖放操作在照片集中添加或删除照片。
If the user chooses to delete, the set of selected appointments is marked as invalid in the record store.
如果用户选择删除，所选择的这组约会在记录存储中被标记为无效。
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。
Select any static policies with a match set including type = WAS_TRANSACTIONS, and click Delete.
选择任何包含有type = WAS_TRANSACTIONS匹配设置的静态策略，单击Delete。
If this is set, even root cannot delete the file until the attribute is unset.
设置完成后，即使是root用户也不能删除文件，直到属性解除。
A common set of patterns across most Web applications relates to create, read, update, delete (CRUD) functionality.
大多数Web应用程序的通用模式集涉及到创建、读取、更新、删除(CRUD)功能。
If TRIGDEPTH is set to 3,000 then ChompQ will calculate a negative number of messages to delete.
如果TRIGDEPTH设置为3,000，那么Chom pQ计算的需要删除的消息数量将是一个负数。
If you did not delete the cookie already set, you will be allowed to select a flight from Welcome.jsp without having to log in again.
如果您没有删除已经设置好的cookie，那么您不必再次登录，就可以在Welcome . js p中选择航班。
So, you will have to delete both interfaces using the rmdev -dl -r command, re-detect the correct device using CFGMGR, and then set an IP address.
因此，您不得不使用rmdev—dl- r命令删除所有接口，使用cfgmgr重新检测正确的设备，然后设置一个IP地址。
New MQI function calls are used to set, inquire about, and delete message properties (MQSETMP, MQINQMP and MQDLTMP).
新的MQ i函数调用用于设置、查询和删除消息属性(MQSETMP,MQIN Q MP和MQDLTMP)。
In the Products view action, you could check to see if the user has permission to update or delete the product and set variables that can be used to display or hide the buttons in the view.
在Products视图操作中，您可以查看用户是否有更新或删除产品的权限，并设置用于显示或隐藏视图中按钮的变量。
A flag, if set, indicates to automatically delete all stored data at application startup.
一个flag，如果设置了，那么表示在应用程序启动时自动删除所有已存储的数据。
The set of operations supported by the service. (for example, POST, GET, PUT or DELETE).
服务支持的操作集合（例如POST、GET、PUT或DELETE）。
The transition so far: it was easy to set up, and I forwarded all incoming Gmail emails to Fastmail. Eventually I'll delete my Gmail, but for now I'll leave it.
转变：这很容易做到，我把我所有收到的邮件都转发到Fastmail里，最终我将要删除我的Gmail账号，但是现在我将要离开Fastmail。
All that remains is to delete the original set of lines and replace it (via an append ) with these accumulated unique lines.
所有留下的这些行将会删除其原始的行组，用这些积累下来的唯一行来替换它(通过一个append )。
When logretain is set to "Capture", the Capture program calls the PRUNE LOGFILE command to delete log files when the Capture program completes.
当logretain设置成“Capture”时，在Capture程序完成时，它会调用PRUNELOGFILE命令来删除日志文件。
To delete the book with the id of 103, you would simply set the URL to point to item 103, change the method to delete, then press GO again (Figure 22).
要删除ID为103的图书，您只需将URL设置为指向项目103，将方法更改为DELETE，然后再次单击GO(图22)。
Use the Add, Change, and Delete buttons to set up all the input parameters that are needed and click Next.
使用Add、Change和Delete按钮设置函数所需的所有输入参数，并单击Next。
Delete form: the delete form lists the set of appointments and provides the option to select one or more.
删除表单：删除表单列出一组约会，并提供选择一个或多个的选项。
But the new service could set off privacy alarm bells: Every conversation will be kept for posterity, unless users delete them.
但是，新的服务会引发隐私警钟：每次谈话都会保留，除非用户将其删除。
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。
An example of a standard associated with contract expression is the CRUD (create, read, update, delete) convention traditionally used to outfit components with a predictable set of methods.
服务表达相关的标准的一个例子是CRUD(增删改查)，传统上，它用于给组件配备一组可预见的方法。
An example of a standard associated with contract expression is the CRUD (create, read, update, delete) convention traditionally used to outfit components with a predictable set of methods.
服务表达相关的标准的一个例子是CRUD(增删改查)，传统上，它用于给组件配备一组可预见的方法。
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