数据修改

这些运算包括模式定义、数据插入、数据查询、数据修改、数据删除。

They include scheme definition , data insertion , data query , data update , and data deletion .

数据修改语言是一种用户通过它可以用编程方法访问或处理数据的语言。

A DML is a language through which a user can access or manipulate data programmatically .

在大多数Web应用程序中，都会希望限制这种访问和其他形式的数据修改。

In most Web applications , you would want to restrict posting access and other forms of data modification .

排他锁：用于数据修改操作，比如INSERT、UPDATE、或DELETE。

Exclusive Locks : Used for data-modification operations , such as INSERT , UPDATE , or DELETE .

讨论的第一种数据修改技术是数据删除，这通过使用SQLDELETE语句来执行。

The first data modification technique discussed was data deletion , which is performed by using the SQL DELETE statement .

Asynchronous：并不以任何方式推迟提交主数据库上的数据修改，日志记录异步地传输给备用数据库。

Asynchronous : Committing a database change on the primary database is not held up in any way by the communication of log records to the standby database .

例如，Ajax经常用于对用户输入作出响应，然后使用从服务器获得的新数据修改页面的部分内容。

For instance , Ajax is often used in response to user input to modify parts of a page with new data fetched from the server .

Synchronous：主数据库上的数据修改并不马上提交，而是等到已经把相关联的日志记录写到备用DB2实例上的事务日志文件时才提交。

Synchronous : A database change made on the primary database won 't be committed until the associated log records have been written to the transaction log file on the standby DB2 instance .

如果NOTLOGGED表在执行数据修改语句期间碰到了执行错误，那么对于DB2来说，就只有一个选择：清空（truncate）该表。

If a NOT LOGGED table encounters an execution error during a data changing statement there is only one choice for DB2 : to truncate the table .

代替执行查询，它可以使用JDBC方法executeUpdate（）执行数据修改。

Instead of executing a query it is possible to perform data modification using the JDBC method executeUpdate () .

在我的示例代码中，我还写入了另一个XML文件（conversionsdelete.xml），以展示WebRowSet是如何以XML格式表示数据修改的。

In my sample code , I write to yet another XML file ( conversionsdelete . xml ) to show you how the WebRowSet represents our modification of the data in XML form .

支持这些操作的大部分web服务都需要一个用户名、密码和/或AIP键来执行数据修改；通常您可以从每个服务的网站免费获取这些凭据。

Most web services that allow these operations require a username , password , and / or API key to perform data modification ; you can usually obtain these credentials for free from each service 's website .

在掌握了所有这些背景信息之后，让我们来看一下如何使用YQL数据修改功能来构建一个示例应用程序。

With all this background information at hand , let 's look at building an example application that utilizes the YQL data modification capabilities .

HADR把数据修改从源数据库（称为主数据库）复制到目标数据库（称为备用数据库），从而防止数据丢失。

HADR protects against data loss by replicating data changes from a source database , called the primary , to a target database , called the standby .

从数据库管理系统设计中数据修改模块的顺序驱动编程和事件驱动编程的比较入手，提出了事件驱动编程中控制Browse需要考虑的几个问题，并具体分析了每个问题的解决办法。

Starting with the comparing between sequence-driver programming and event-driver programming of the data modification model in DBMS ' designing , this paper presented some questions about Browse 's controlling in EDP that should be considered and analyzed the solutions of each question concretely .

选择适于有机高分子的DREIDING分子力场，根据模型的原子类型，参照文献数据修改其力场参数。

DREIDING was chosed as force field and its parameters is modified according to the published data .

默认情况下，AUTOCOMMIT处于启用状态，并且所有数据修改过程都将导致执行一次提交操作&该操作在默认情况下将关闭所有打开的游标。

By default , the AUTOCOMMIT mode is on , and any data-modification process causes a commit operation to be performed & which , by default , closes any open cursors .

未使用快照隔离级别并进行了数据修改（这些修改在tempdb版本存储区中生成行版本）的当前活动事务的数目。

The number of currently active transactions that are not using snapshot isolation level and have made data modifications that have generated row versions in the tempdb version store .

本文将介绍的第一个数据修改技术是删除数据。

The first data-modification technique this article will address is deleting data .

它使用语法分析来确定一个数据库查询如何被一个数据修改操作所影响。

It determines how to be influenced data inquiry by data modification .

最后基于分析数据修改被列出去解决问题。

Based on analysis data modifications were drawn up to solve the problems .

因为用户量也在增长，数据修改变得越来越慢。

Because the user base also grew , data changes became slower and slower .

所有容器都提供了两种标准的事件类型：数据修改和内容完成。

All containers provide two canonic event types : data change and content complete .

如果还有兴趣，请尝试根据附加数据修改音量参数。

For additional interest , try modifying the volume parameters based on additional data .

应使用单独的触发器级联数据修改。

Use separate triggers to cascade data modifications .

一种面向数据修改的核更新算法

Updating algorithm of core for case updating

系统中电话号码、报警信息、数据修改和用户管理都建立了数据库，以便用户对各种数据信息进行查看。

Telephone numbers , alert information and data alternation in the system are all stored in databases .

该控制器采用反向传播学习算法自动调节控制规则，并通过辨识器部分获取数据修改控制器参数。

This kind of controller use back-propagation learning , and its parameters ate modified with a distinguisher .

请注意，这里的持久表示的是数据修改的一种属性，而并非数据存储。

Note that persistent here refers to a property of data modification , and not to data storage .

在每一种场景中，数据修改都将被自动同步，可以逐一执行同步，也可以按需同步。

In each scenario , data changes are synchronized automatically , transaction by transaction , or on demand .