每执行一次查询，都会引用该策略。
要获得信息，您要做的就是执行一次查询。
All you have to do to get the information out is make a query.
这里，我们对数据库进行一次查询，以获得所有的行。
Here, we make one query to the database to get all the rows.
如果对两者都支持，那么可以在同一次查询中使用它们吗？
范例：您可以运行一次查询，然后当后台运行查询时开始处理一次缺陷。
Example: You can run a query, then start working on a defect while the query is running in the background.
对于DayTrader应用程序来说，每个任务都需要对数据库执行一次查询。
For the DayTrader application, each task performs a query against the database.
DB 2只缓存一次查询本身及其访问计划，就可以在每次执行该查询时使用它们。
The query itself and its access plan are cached once by DB2 and are then ready to be used every time the query is executed.
Lucene支持域搜索，你可以指定一次查询是在哪些域(Field)上进行。
Lucene supports field search. You can specify the fields that a query will be executed on.
AddService方法被重载，以便在第一次查询服务时创建相应的服务。
The AddService method is overloaded to create services the first time they are queried.
REOPT ONCE：查询执行中只发生一次查询优化，即在查询第一次执行时。
REOPT once: query optimization occurs once at query execution time, when the query is executed for the first time.
比如，我常常听说XQuery能够一次查询多个不同的源文件，因此要比xslt优越得多。
For example, I often see the claim that XQuery's ability to query multiple, disparate sources in one pass gives it a distinct advantage over XSLT.
当只需要对数据库进行一次查询或简单的更新时，让会话bean直接访问数据库是正确的选择。
When just a query or a simple update to a database is needed, a session bean directly accessing the database is the right choice.
这是因为ObjectGrid只支持单阶段提交事务(比两阶段提交要快得多)，因此一次查询只能跨越单个分区。
This is because the ObjectGrid only supports one-phase commit transactions (which are much faster than two-phase commit) and therefore a query can only span a single partition.
然而，看看可行的、首选的航班数量如此之多时，我们应该认识到不要再用穷举搜索法对每一次查询进行验证。
However looking at the total number of possible flights to ones that are viable and preferable should start to eliminate the need to apply Brute Force searching to every single query.
当事务再次执行查询，并发现一组结果自最后一次查询后由于另一个事务提交了新的数据而发生了更改，则会发生幻像读。
A phantom read occurs when a transaction re-executes a query and finds a set of results changed since the last query due to another transaction that committed new data.
尽管一次查询请求可能不会返回队列中的所有消息，但是如果一直从队列中获取消息，最终会取样所有服务器，您就会得到所有消息。
Even though a particular request may not return all messages in the queue, if you keep retrieving from the queue it will end up sampling all of the servers and you'll get all your messages.
如果使用惰性抓取，在默认情况下将执行11个查询—执行一个查询获取职员的列表，然后为获取每个职员的地址各执行一次查询。
By default, if lazy fetching is used, 11 queries will be executed - one for the list of employees and one for each employee's address.
许多查询会采用不同的文字反复进行，“他们常常查询众多数据，比如一次查询5年的历史数据，”Matthews说。
Many are repeated with different literals and they can ask for “a lot of data, such as five years of history at a shot,” Matthews says.
这意味着您必须先处理完查询结果，然后再重用JDBCStatement——例如，重新发出数据库查询——否则将丢失上一次查询到的所有结果。
This means you need to first process a query result completely before reusing a JDBC Statement — for example, by reissuing a database query — or you will lose any results from the previous query.
如果执行每小时监控的应用程序执行全局重置，那么每天查询一次监控数据的应用程序只能看到前一小时的数据。
If the application performing hourly monitoring were to perform a global reset, the application querying monitoring data once every day would only see the data from the last hour.
这一次，该查询将运行成功。
作业对各订单id执行一次数据库查询。
在此示例中，下一步是关闭游标并执行一次SELECT查询以显示修改后的结果。
In this example, the next step is to close the cursor and execute a SELECT query to display the modified results.
一次修改原始查询的一个地方，并进行测试，以查看是否提高了性能(减少了响应时间)。
Make changes to your original query one at a time, and test to see if the performance has improved (decreased response time).
连接至数据库服务器所需的时间是一次延迟，等待查询完成添加附加停顿，并且结果的传输甚至会导致更多延迟。
The time required to connect to a database server is one delay, waiting for the query to finish adds additional hesitation, and the transfer of results incurs even more latency.
为了统一uddi搜索查询的格式和极大的减少一次搜索中的请求次数，我们提出这一基于XML的语言。
We propose this XML-based language to make uniform the UDDI search query format and dramatically reduce request times in a search.
但问题是，EXPLAIN提供的只是特定查询的一次执行的估计值。
The problem is that EXPLAIN provides estimates for only a single execution of a given query.
我们仅需一次执行查询。
REST通常从服务入口url开始形成一次请求，然后以查询字符串的形式追加搜索参数。
Typically, REST forms a request by beginning with a service entry URL and then appending search parameters in the form of a query string.
REST通常从服务入口url开始形成一次请求，然后以查询字符串的形式追加搜索参数。
Typically, REST forms a request by beginning with a service entry URL and then appending search parameters in the form of a query string.
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