• Again, you can see the distribution of values in each segment.

    同样一个细分上可以看到分布

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  • In this case, the optimizer assumes an even distribution of all values in COLUMN_Y, which means it assumes that all values have the same frequency.

    这种情况下优化认为所有在COLUMN_Y中是平均分布意味着认为所有的值都有相同的出现频率

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  • The script checks the distribution statistics to find the system default as one of the most frequent values.

    脚本检查分布统计信息发现作为出现频繁之一系统默认值。

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  • Predicates with concrete values are important for the optimizer to be able to use available distribution statistics.

    使优化器能够使用可用的分布统计信息,带有具体谓词极为重要

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  • The frequency distribution is stored in the metadata repository as a distinct set of values with their associated count of occurrence.

    频率分布存储元数据储存库中形式不同和与之相关出现次数计数

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  • In other words, if you have 90% of your values between a certain range, the frequency distribution would tell you what the outlying values are and may indicate a quality issues in those outliers.

    话说,如果90%某个范围内,那么频率分布告诉有什么生僻值,并且可能表明那些生僻的值存在质量问题

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  • The screen shot in Figure 5 below shows the graphical representation of a frequency distribution and shows a highly skewed set dominated by a pair of values.

    5中的屏幕截图显示频率分布图形化表示显示了一个支配高度倾斜集合

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  • This article discusses how to make up a test data set so that it is large enough to be useful for testing and has the expected distribution of values and correlation between columns.

    本文讨论了如何构建一个测试数据集,使该数据集达到用于测试规模并且具有期望分布列间相关性。

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  • Results are readily displayed and allow the user to quickly understand duplicated values or drill back into the full frequency distribution for single or multiple columns as Figure 11 shows.

    评价结果立即显示出来使用户可以快速理解重复或者回过头查看单个多个全部频率分布如图11所示。

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  • Although the access plan is better than the access plan with concrete values without distribution statistics, it is worse than the access plan with concrete values with distribution statistics.

    虽然这个访问计划使用具体没有分布统计信息情况下访问计划好,不如使用具体值又分布统计信息时的访问计划。

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  • Bad distribution of hash values.

    糟糕散列分配

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  • A nice little histogram showing me the values I get, and we will come back to this later and talk about why this is called a normal distribution.

    一个很好的形图,它能告诉我我获得是多少,我们下一次还讲到这个柱形图,并且讲到为什么它被称作,正态分布。

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  • Without column data-value distribution information in the catalog, DB2 will assume an even distribution of values, which may lead the optimizer to a sub-optimal access path.

    如果编目没有数据分布信息DB 2就会假设均匀分布可能导致优化选择最优的访问路径。

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  • The table has exactly the required distribution of values.

    该表刚好具有所需分布

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  • The spread of the distribution, called its variability, indicates the degree to which observed values will vary from the mean.

    这些分布状态扩展称作可变性表示观测值偏离中间值的程度

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  • While the most extreme cases involve smaller, less developed countries, the same distribution also applies to more developed ones-and with much larger absolute values for GDP loss.

    虽然极端案例包括较小的发达程度不足的国家同样分布情况适用更为发达的国家—其GDP损失绝对值要大

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  • As the optimizer is not aware of the uneven distribution of the STATE values, it decides to use the index I_TYPE.

    由于优化器知道state不是均匀分布,因此决定使用索引i _ TYPE。

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  • Where the frequency distribution shows data values decreasing in occurrence from some common condition to a rare condition, a skew exists.

    如果频率分布显示数据经常出现变为很少出现,则存在倾斜

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  • Calculate the distribution of column values.

    计算分布

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  • The hash code should provide a uniform distribution of values over the key space so that the partitions are evenly balanced.

    应该空间提供均匀分布以便分区负载平衡

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  • The attribute that has the widest distribution of values is considered the best candidate to be the first question asked in the next cycle.

    分布广属性最适合下次循环中作为第一问题提出

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  • Instead of this single value, a random variable has a function that describes the likelihood of values for the estimate and is called the variable's probability distribution.

    取代单个随机变量拥有描述估计值可能性函数函数称为变量概率分布

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  • If you execute RUNSTATS with the additional option with DISTRIBUTION, you also get the most frequent values for each column.

    如果使用附加选项WITHDISTRIBUTION执行RUNSTATS那么可以获得每个列中出现频繁

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  • Generate data with given distribution of values for several columns.

    几个生成具有给定分布数据

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  • The low mode populates only the scalar statistical values (that is, no distribution information) of a table.

    low模式填充表标量统计(也就是说没有分布信息)。

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  • The number of distinct values must be great enough to ensure an even distribution of rows across all database partitions in the database partition group.

    distinct数量必须多到足以确保数据行均匀分布数据库分区中的所有数据库分区上。

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  • The Heat Map displays values on either a clustered, linear or logarithmic scale, to help spot uneven distribution of data across threads.

    HeatMap”中能够以集群(clustered)、线性(linear)或者对数(logarithmic)的方式显示帮助我们线程识别出对数据不平均分布

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  • The large number of distinct values in the pdb_id column ensures a relatively even distribution of rows over the database partitions.

    pdb_id各异数量很大,确保了跨数据库分区可以获得相对均衡分布

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  • This is why the shape of the Chi Square sampling distribution changes for different df values.

    就是为什么X平方分布抽样分布的形状随着df值的不同而变化的原因。

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  • This parameter allows you to specify the number of "most frequent values" that will be collected when the WITH DISTRIBUTION option is specified on the RUNSTATS command.

    参数允许指定“高频(mostfrequent values)”数目RUNSTATS命令指定WITHDISTRIBUTION选项时,收集该值。

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