允许操作下推的主要挑战是确保无论在何处执行操作，取得的查询结果总是相同的。
The major challenge of allowing an operation to be pushed down is to ensure that the same query result can be achieved regardless of where the operation is performed.
RDQL允许简明地表达复杂的查询，查询引擎执行访问数据模型的繁重工作。
RDQL allows complex queries to be expressed concisely, with a query engine performing the hard work of accessing the data model.
将AUTOTRACE选项设置为ON 将允许显示该会话中执行的每条语句的说明和统计信息，以及查询结果，直至 AUTOTRACE 被禁用。
Setting the AUTOTRACE option ON will enable the display of explain and statistics information for each statement executed in that session along with query results, until the AUTOTRACE is disabled.
取决于操作的不同，允许在远程数据源上执行操作可能有助于查询的整体性能。
Depending on the operation, allowing it to be evaluated on a remote source might help the overall performance of the query.
它允许用户执行快速关键字查询，查找匹配给定查询的文档。
It lets users perform fast keyword look-ups and finds the documents that match a given query.
除了主机服务器上的调度器外，snippet处理器也具有自己的智能抢占式调度器，允许同时执行来自多个查询的snippet。
In addition to the scheduler on the host servers, the snippet processors have their own smart preemptive scheduler that allows snippets from multiple queries to execute simultaneously.
对于同时涉及本地表和远程（昵称）数据的查询，可以采用允许本地查询和多个远程查询片段并发和异步执行的执行计划。
Queries that involve both local tables and remote (nickname) data have the possibility of execution plans that allow concurrent and asynchronous execution of local and multiple remote query fragments.
这样就可以允许在执行查询的时候才把图传递给它。
This allows a graph to be passed to the query when it is executed.
同时涉及本地表和远程（昵称）数据的查询特别适合于允许本地和多个远程查询片段并发和异步执行的执行计划。
Queries that involve both local tables and remote (nickname) data are candidates for execution plans that allow concurrent and asynchronous execution of local and multiple remote query fragments.
这里所描述的增强，其目的是将允许在大大扩展的环境中异步执行多个远程查询的查询计划引入到WFS V9.1中。
The purpose of the enhancements described here is to introduce query plans into WFS V9.1 that enable asynchronous execution of multiple remote queries in greatly expanded circumstances.
这就允许数据联合服务器接收对集成视图的查询和计算要执行的最优子操作数量和类型。
This allows the data federation server to receive queries against the integrated view and to calculate the optimum number and types of sub operations to perform.
这里描述的增强为WFSV9.1引入了允许在大大扩展的环境中能有多个远程查询异步执行的查询计划。
The enhancements described here introduce query plans into WFS V9.1 that enable asynchronous execution of multiple remote queries in greatly expanded circumstances.
EPCIS为执行特殊查询提供了接口，还允许提交“持续的”查询，从而定期提供新结果。
EPCIS provide an interface for executing ad-hoc queries as well as for submitting "standing" queries that deliver new results periodically.
ManufacturingExecutionSystemTransaction：为大量制造执行系统提供无依赖性的接口，允许查询制造批次状态和属性。
Manufacturing Execution System Transaction: Provides neutral interface to numerous manufacturing execution systems, enabling manufacturing lot status and attributes to be queried.
XPathQueryService：允许使用XPath查询集合或资源，包括用于名称空间映射和查询执行的方法。
XPathQueryService: Allows you to use XPath to query a collection or resource, including methods for namespace mapping and for query execution.
SQLInjection攻击的基本原理如下：您创建一个网页，允许用户向文本框中输入文本，用于对数据库执行查询。
The basic idea behind a SQL injection attack is this: you create a Web page that allows the user to enter text into a textbox that will be used to execute a query against a database.
您处理的下一个文档将包含新属性keywords，它允许您在XPath查询中执行全文搜索。
The next document you process will contain the new attribute keywords, allowing you to do full-text search in the XPath queries.
ODBC是一个允许应用程序连接外部数据库服务器和文件、并执行查询操作的标准协议。
ODBC is a standard, well established protocol that permits applications to connect external database servers or files, and perform query operations.
ODBC是一个允许应用程序连接外部数据库服务器和文件、并执行查询操作的标准协议。
ODBC is a standard, well established protocol that permits applications to connect external database servers or files, and perform query operations.
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