这里需要返回数据，并执行更新。
Data needs to be returned and an update needs to be performed.
频繁地执行更新、重建基础，及交付操作。
如果值有效，则执行更新查询。
大多数情况下，执行更新的数据源不应该被缓存。
In most cases, feeds that perform updates should not be cached.
然后使用这些原始值执行更新或删除操作。
The update or delete operation is then performed using these original values.
用存储库执行更新，从而集成其他开发人员所做的修改。
Perform an update with the repository to integrate changes from other developers.
使用附加的服务器程序，它会在文档修改时立即执行更新
Using an add-on server program that transparently performs the update immediately when documents are modified
会抛出一个异常，表示您正在试图对一个只读连接执行更新。
The correct answer here is A. An exception will be thrown, indicating that you are trying to perform an update operation on a read-only connection.
如果变更了本地文件而又想同步变更存储库，就需要执行更新。
If you make changes to your local files and you want to sync up with changes at the repository, you perform an update.
然后我们创建这个查询(换言之，where子句)并执行更新。
You then create the query (in other words, the where clause) and execute the update.
Collection中的对象集只有在执行更新时才会被索引。
The object sets included in the collection are not indexed until an update is performed.
根据您的风格选择适当的方法，从而把您忘记执行更新时的风险降到最低。
Choose the approach that fits your style and offers the least risk when you forget to make an update.
有许多这种客户机使用对应用程序很有意义的特定方法执行更新、删除和查询。
There are many such clients performing the updates, deletes, and queries in a specific way that is meaningful to the application.
您无需设计额外的对话框来询问用户在程序运行时是否需要执行更新检测。
You do not have to design additional dialogs that ask the user if update checks should be performed while your application is running.
此处，我假定processtrade方法调用的其他方法不执行更新操作。
(I am assuming here that the other methods invoked by the processTrade method do not perform update operations.)
常常希望只准备和编译UPDATE语句一次，然后在每次执行更新时传递一个新值。
Often you will want to prepare and compile the UPDATE statement only once, and then pass in a new value every time you execute the update.
如果值是有效的，则创建JSON对象且使用HTTPPUT执行更新调用来进行更新操作。
If the values are valid, a JSON object is created and the update call will be executed using HTTP PUT for updating.
有一种实现的方法是为Ant编写一个日志任务，在每一个目标开始或结束的时候执行更新。
One way to implement this is to code a logger for Ant that performs the update at the beginning or end of each target.
通过此策略，由于您未对数据保持读取锁，因此在执行更新操作时遇到失效数据异常的机率会增加。
With this strategy, because you are not holding read locks on data, the chance of getting stale data exceptions when you execute the update operations increases.
除非对现有应用程序执行更新，否则这些信息没有什么用处，但是对于编写新应用程序十分有帮助。
This information won't help existing applications unless you update them but can be useful when writing new ones.
如果连接到数据库的应用程序主要执行更新数据的事务，那么增加清除程序的数目会提高性能。
If the applications for a database consist primarily of transactions that update data, an increase in the number of cleaners will speed up performance.
这里可以变得复杂一些并将更新放入队列，这样可以在稍后服务器或网络恢复时重新执行更新。
You could get quite sophisticated here and queue up the updates so they can be re-tried later when the server or network are back up.
如果同时对不同网络上的两个数据库执行更新操作，这两个数据库不会同时准确地获取下一个惟一标识符。
If an update operation is made at the same time on two databases on separate networks, they cannot both accurately retrieve the next unique identifier.
如果状态表(表2)在todo_foreign更新之后执行更新，那么您将得到不一致的数据。
If the status table (table 2) update happens after the todo_foreign update, you'll have inconsistent data.
还可以选择“使用开放式并发”来指定希望命令确定在执行更新或删除操作前数据是否已经被修改。
You can also select Use optimistic concurrency to specify that you want the commands to determine whether the data has been modified before an update or delete operation is performed.
当支持通过HTTP GET执行更新操作时，也需要应用类似的Web方法重构，如清单4所示。
A similar refactoring of a Web method also needs to be applied in cases where an update operation is supported over HTTP GET, as shown in Listing 4.
如果同时使用JDBC和EJB2CMP访问数据库，那么当在一个事务中同时执行更新和查询时会发生数据同步问题。
Accessing the database using both JDBC and EJB2 CMP can cause data synchronization issues when update and query are performed together within one transaction.
必须关闭工具包，因为Ant构建文件将执行更新方案工作区的MessageBroker命令实用工具。
The toolkit must be closed because the Ant Build File executes Message Broker command utilities that update the scenario workspace.
身为开发人员，您有相当大的弹性，指定何时和如何执行更新检查、是否强制更新，以及应用程序在何处检查更新。
As a developer, you have lots of flexibility in specifying when and how update checks are performed, whether updates are mandatory, and where the application should check for updates.
身为开发人员，您有相当大的弹性，指定何时和如何执行更新检查、是否强制更新，以及应用程序在何处检查更新。
As a developer, you have lots of flexibility in specifying when and how update checks are performed, whether updates are mandatory, and where the application should check for updates.
应用推荐