cardinality
美 
英 [kɑːdɪ'nælɪtɪ]
英汉解释
例句
Call a set of integers fat if each of its elements is at least as large as its cardinality.
称一个整数的集合为饱和的，如果它的每一个元素都至少不小于其基数。
You may have noticed that the query access plan itself did not change with the increase in cardinality estimate.
您可能已经注意到了，查询访问计划本身并未随着基数估计值的增大而改变。
The optimizer depends on accurate cardinality estimates to properly compute the cost of each query access plan considered.
优化器凭借精确的基数估计值来准确计算出每一个待定查询访问计划的成本。
As mentioned, the cardinality of the address containment within a contact is assumed by the Relational DAS to be one-to-many.
刚才已经提到，联系人中地址包容的二元关系由关系型DAS假定为一对多的关系。
Notice that there is a significant difference between the cardinality shown in the fetch node on the outer side of the join in Figure 7.
请注意在图7中联接的外部Fetch节点上所显示的基数之间有一个显著的不同。
Generate the access plan and see what the optimizer estimates the total cardinality (Number of rows) returned by the query will be.
生成访问计划，查看优化器对该查询返回的总基数（行数）的估计值。
When examining an access plan, you may find that the estimated cardinality is not as accurate as it should be.
在分析访问计划时，可能会发现与集的基数不像希望的那样精确。
In real-life scenarios, typically the cardinality of an output structure in a message will mirror the cardinality of an input structure.
在真实的场景中，输出结构的基数通常等于输入结构的基数。
Correlated subqueries are often used to test whether relationships exist without regard to cardinality.
相关性查询通常用于测试某种关系是否存在，而不管返回记录集的大小，
Distinct cardinality is the number of distinct values in a column of a row set.
不同的行集数是在列行集上的不同的数值。
I would not mind seeing a later revision of RELAX NG that incorporates more flexible cardinality constraints .
我不会介意以后看到合并了更灵活的基数约束的RELAXNG修订版。
Give lower priority to operators that do not change the cardinality of the plan.
为不改变计划基数的操作分配较低的优先级。
Element , however, lets you intersperse patterns while obeying the cardinality of each contained pattern .
元素允许您在遵守所包含的每个模式的基数同时，可以分散排列这些模式。
It has long been understood that cardinality is a core organizing principle of early Chinese cosmological thinking.
在早期中国的宇宙论思想中划分四正方向是一个核心组织原则，这一点早已得到认同。
The product of individual column cardinalities is compared to the cardinality of the column group to get better correlation estimates.
较于列组的基数，单个列的基数（cardinality）的乘积将获得更好的相关性估计。
Because there are no additional predicates to be applied by the fetch operation, the output cardinality of the fetch node is also eight.
因为这里没有通过提取操作应用附加的谓词，所以提取节点的输出基数也是8个。
In addition to the cardinality information, the properties of a role establish how the two entities behave in relation to each other.
除基数信息外，角色的属性还确定了两个实体相互间的行为方式。
Strive for no more than one call after a single cardinality find on a home, or a next on an iterator retrieved from a collection.
在本机上找到一个基数，或者通过迭代器从集合中检索到下一个基数后，尽量使用不超过一个调用。
Configuration variable included type variable, property variable, port variable and cardinality variable.
配置变量分为类型变量、属性变量、接口变量、基数变量四种类型；
If table statistics are not available, then the estimator uses the number of extents occupied by the table to estimate the base cardinality.
如果表统计数据是无效的，那么估计器使用占用的表扩展来估计基本的行集数。
XML Schema allows enforcement of specified ordering, cardinality, and data types within a schema instance.
XML模式允许在一个模式实例中使用指定顺序、基数（cardinality）和数据类型。
The cardinality of the input schema can determine if multiple values can be selected.
输入模式中的基数决定是否可以选择多个值。
The cardinality estimate is slightly higher than the actual value of 4 since the column group statistic is a uniform distribution statistic.
由于列组统计信息是一个均匀分布的统计信息，所以基数估计值比实际值4稍高了一些。
You use the radio buttons on this page of the wizard to specify the cardinality of the relationship.
使用向导此页的单选按钮指定关系的基数性。
However, the memory allocated for an array is based on its cardinality, and not on the maximum cardinality of its type.
然而，阵列的已分配内存是基于其基数的，而不是基于其类型的最大基数。
The cardinality represents the estimated number of rows returned from the access plan operator.
基数（cardinality）表示访问计划操作符所返回的行的估计数目。
This paper mainly concerns the construction of one-dimension non measurable set and the cardinality of its class.
该文主要探讨一维不可测集的构造以及一维不可测集全体所组成的类的势。
This is actually the per-partition cardinality estimate, and not the total cardinality.
这实际上是每个分区的基数估计值，不是完整的基数。
The same cardinality estimate is carried up, and no counts are needed for these two operators.
同样进行基数估计，但是这两个操作不需要计数。
This example illustrates the effect that partial statistics have on the ability of the optimizer to estimate the cardinality.
这个示例解释说明了部分统计信息对于优化器估计基数的能力的影响。
The candidate key of minimum cardinality problem was pointed out to be NP-complete in literature [1], [2], and [3].
文献[1]、[2]、[3]均明确指出，求一个关系模式的最小基数候选关键字问题是一个NP完全问题。
Given that the table cardinality is about 50000; it should not be a performance disaster, either.
假设表基数大约是50000；这也将会是性能上的灾难。
Function CARDINALITY, used in line 15, returns the number of elements in the input array.
函数CARDINALITY用于第15行，返回输入阵列中的元素数量。
With three predicates applied in the WHERE clause, assuming they are independent results in the optimizer underestimating the cardinality.
在WHERE子句中应用了三个谓词，如果假设它们是独立的话，会导致优化器低估基数。
Operators whose cardinality in the plan remains the same can be skipped in the interim.
可以暂时跳过计划中基数不变的操作。
The cardinality estimate of 7 does not match the actual result of 12.
基数估计值7与实际结果12不符。
The higher the cardinality, the more probes into the inner table, one per qualifying (outer) record.
基数越高，进入内部表、每一条合格的（外部）记录的探测就越多。
Contrast that with CUST_INTEREST, in which the number of qualified rows is the same as the cardinality (31, 255).
与CUST_INTEREST相比，符合条件的行数与基数一样（31,255）。
To enter the array index information select the Inline map and select the Cardinality tab in the Properties pane.
要输入数组索引信息，请选择Inlinemap并在Properties窗格中选择Cardinality选项卡。
The value of the second argument to TRIM_ARRAY must be a value between 1 and the cardinality of the first argument.
针对TRIM_ARRAY的第二个参数的值必须是1和第一个参数的基数之间的值。
