通过数据抽样，只需扫描数据的一个子集即可。
计数型数据抽样的接收准则应是零缺陷。
For attribute data sampling, the acceptance level shall be zero defects.
总之，统计信息的准确性取决于抽样率、数据倾斜(data skew)以及用于数据抽样的数据群集。
In summary, the accuracy of statistics depends on the sampling rate, the data skew, and data clustering for data sampling.
与连接类似，如果在规则中定义了数据抽样，那么会在InfoSphereDataStage任务中执行。
Like joins, if a data sampling is defined within a rule, then it is done within the InfoSphere DataStage job.
接收准则应由组织定义，要求时，应由顾客批准。对于计数型数据抽样，接收水平应是零缺陷(见8.2.3.1)。
Acceptance criteria shall be defined by the organization and, where required, approved by the customer. For attribute data sampling, acceptance level shall be zero defects (see 8.2.3.1).
行级的抽样读取所有数据页，但是只考虑每页上一定百分比的行，因此只包含相应xda页面中的一部分。
Row level sampling reads all data pages but considers only a percentage of the rows on each page, and therefore only a subset of the corresponding XDA pages.
ADC的前提是根据抽样的一小部分表数据自动创建一个代表性的压缩字典。
The premise behind ADC is to automatically create a representative compression dictionary based on sampling a small subset of table data.
但是，如果关系数据值是高度聚集的，那么行级抽样可以产生更精确的统计信息。
But, row level sampling may produce more accurate statistics if relational data values are highly clustered.
如果想通过电话调查提供有效、可靠和有代表性的数据，现在有必要开展移动电话抽样和采访工作。
Sampling and interviewing respondents by cell phone is now a necessity if telephone surveys are to provide valid, reliable and representative data.
“全球价值调查”称，从1981年到2007年间所做的全国抽样调查的数据显示，绝大多数受调查国家的幸福指数都有所上升。
Data from representative national surveys conducted from 1981 to 2007 show the happiness index rose in an overwhelming majority of nations studied, according to WVS.
有两个因素会影响adc：可用于抽样的最小(阈值)数据量(adc _ THRESHOLD)和抽样缓冲区中有用数据的最小百分比(adc_minpct)。
There are two factors that affect ADC: a minimum (threshold) amount of data is available for sampling (ADC_THRESHOLD) and a minimum percentage of useful data in the sampling buffer (ADC_MINPCT).
这种数据的准确性取决于很多因素，例如采用的抽样算法的类型、抽样的数量和数据的歪斜情况。
The preciseness of this data depends upon a large number of factors such as the type of sampling algorithm used, the number of samples taken, and the skew of the data.
对于其他接口，如图1所示，抽样数据(用于构建adc字典)直到执行离线table reorg时才被压缩。
For other interfaces, the sampling data (used for building the ADC dictionary) remains uncompressed, as seen in Figure 1, until an offline table reorg is performed.
StatCounter提供的是综合数据，来自一个150多亿次访问量的抽样调查。
StatCounter's figures are based on aggregate data on a sample of over 15 billion page views per month.
质量控制抽样代理(QC抽样代理)的任务是简单地度量数据库的状态，并将该数据记录在一个数据库表中。
The Quality Control Sampling Agent has the simple task of measuring the status of the database and recording this data in a database table.
而页级的抽样则可以显著减少I/O，因为它只读取一定百分比的数据页。
Page level sampling reduces I/O significantly since it reads only a percentage of the data pages.
在DB 29中，在构建字典时，任何小于或等于数据库管理器最小记录长度的数据行都不用于抽样，并且在行压缩期间不会被压缩。
In DB2 9, any data row that is equal to or less than the database manager minimum record length is not used in the sampling when building the dictionary, and is not compressed during row compression.
如果数据值得备份，那么它也值得您时常进行抽样检查。
If your data is worth backing up, then it's also worth spot checking from time to time.
在本文提供的示例脚本中，抽样频率是每2秒抽样一次，这样可以提供快速的反馈，但是在短时间内会产生较多的样本数据。
In the example script provided, the sampling rate is every two seconds, which provides rapid feedback, but generates quite a bit of sample data in a short period of time.
如果要在1分钟内评测数据库运行中断事件，那么必须每30秒进行一次抽样。
If you want to measure a database outage to a one minute resolution, that means you have to sample every 30 seconds.
抽样产品，进行测试，记录数据，执行工艺操作的统计过程控制，并写入生产日志。
Sample products, perform tests, record data, carry out statistical process control on process operations, and write production logs.
设计适当的抽样和调查方法，可以充分的提高评估数据的准确性，实用性。
Proper design of sampling and survey methods can increase substantially the accuracy and usefulness of assessment data.
最后，我们提出了一种基于抽样的快速数据分类算法。
Finally, we present a fast data classification algorithm based on sampling.
数据库质量控制和统计抽样。
一种新的抽样方法是把数据挖掘技术中的分类、聚类及离群点挖掘等应用到审计风险管理中去。
A new sampling method is proposed, which USES the latest technologies of database. It applies classification rule mining, clustering rule and outlier mining to the management of Audit Risk.
根据2000年“中国城乡老年人口状况一次性抽样调查”所得的有关数据，剖析了我国农村老年人在物质、精神和文化三大方面的基本现状。
Based on the 2000's sample data, the paper analyzes old people's current living situation in China from the aspects of material, spirit and culture.
并利用美国汽车召回抽样数据对结论分别进行了验证。
These conclusions are validated by using the automobile recall sample data of United States.
依据农户抽样调查数据，运用逻辑回归模型，对特大城市郊区农村劳动力迁移决策的主要影响因素进行分析。
Based on the sampling survey data to farmers, this paper analyzes, by logit model, the impacts on the migration decisions of rural laborers from metropolitan suburbs.
开关电流(SI)技术是一种新的模拟抽样数据处理技术。
Switched current circuit (si) is a new technique for analog sampled data processing.
开关电流(SI)技术是一种新的模拟抽样数据处理技术。
Switched current circuit (si) is a new technique for analog sampled data processing.
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