What happens when the order of the index column is random?
当索引列的顺序是随机的时候，将会发生什么呢？
But what happens when the order of the index column is random?
但是如果索引列的顺序是随机的，将会发生什么呢？
Butt what happens when the order of the index column is random?
但是如果索引列的顺序是随机的，将会发生什么呢？
Any query that utilizes the Primary Index column will encounter faster response times.
任何利用主索引列的查询将会遭遇更快速响应时间问题。
Create your indexes in the order in which you want those index column predicates applied.
按照您想应用索引列谓词的顺序创建您的索引。
The operator class also specifies the support procedures to be used by the index method when the operator class is selected for an index column.
操作符表还声明索引方法在为一个索引字段选定该操作符表的时候要使用的支持过程。
Therefore a randomized index column can relieve contention problems for sets of similar or sequential values, but it's no help with identical values.
因此，随机化的列可以减轻一组相似值或序列值的争用问题，但对于相同的值没有帮助。
The maintainability Index column also includes a icon that gives a quick indication as to the overall maintainability and complexity of a particular item.
可维护性指数的列也包括了一个图标，它可以直观的表示出可维护性的总体指数，或是某复杂度很高的部分。
This sounds like a lot of conditions, but so far it is straightforward: using the column, the index can be found and the spatial predicate is known using the function.
这听起来好像有一大堆的条件，但还是比较简单的：通过使用列可以找到索引，通过使用函数可以知道空间谓词。
Create a grid index on the spatial column.
在空间列上创建一个网格索引。
If there is an index on the join column, the costs will be significantly less; otherwise the database server must perform table scans for all tables, both outer and inner tables.
如果连接列上有一个索引，那么其成本会相当低；否则，数据库服务器就必须对所有表(外部和内部表)执行表扫描。
Information about the column definitions, index, and statistics for a nickname is stored in the DB2 federated database system catalogs.
关于列定义、索引以及昵称统计信息的信息存储在DB 2联邦数据库系统编目中。
Here you must find the index of the column in the position as it appears in the tree.
此处，我们必须在所选列在树中出现的位置找到该列的索引。
Finally, you can index into the columns by column number and cast the results directly (for some types).
最后，可以根据列编号为这些列建立索引，并直接强制转换结果(对于某些类型)。
For this purpose, an indexed column is any single column with an index or the first column named in a composite index.
为此，索引列是一个包含索引的单列，或者是复合索引中指定的第一个列。
Finally, an index on the additional column is created and the table reorganized based on that index.
最后，在附加列上创建一个索引，并根据那个索引对表进行重组。
Also in the query rewrite vein, modifying a SELECT to get rid of a range-type predicate can increase performance by improving index key column matching.
另外，在查询重写状态下，修改SELECT来摆脱一个范围型谓词，可以通过提高索引键列匹配增强性能。
A functional index transforms the data in a column and stores the derived values in sorted order.
函数索引对列中的数据进行转换并按照顺序保存转换后的值。
This is because it is on the second column of the index.
这是因为它针对索引的第二列。
If you use a nullable VARGRAPHIC column instead, the 1021-byte index limitation is still true.
如果使用可空的vargraphic列，那么1021字节的索引限制仍然是对的。
In this case, the first column of any index, simple or compound, is a candidate to satisfy the star join.
在这种情况下，任何索引的第一行，不管简单或复杂，都是满足星型联接的一个候选者。
While an index on a relational column contains all values from that column, an XML index contains only values of nodes that match both the XML pattern and the data type in the index definition.
关系列上的索引包含了此列的所有值，而xml索引仅包含那些同时匹配XML模式和索引定义中的数据类型的节点值。
To use each variable, you simply use the column number as the index of the single value you want.
要使用每个变量，您只需将列号用作您所需值的索引即可。
The third column is a numeric index for the group.
第三列是组的一个数字索引。
The fourth column shows the index type (as defined in the schema in Listing 5) used to represent the datum.
第四列将显示用于表示数据的索引类型(按照清单5的模式中的定义)。
The column index must be found to extract the textual contents of the column.
必须找到列索引来提取该列的文本内容。
For the purposes of discussion, our chosen index is a three-column index called IX1 created on (COLA, COLB, COLC).
为了便于讨论，我们选择的索引是一个三列索引，名为IX1，在(COLA,COLB,COLC)上创建。
If wanted to, I could also access the same column using the 2 index.
如果想试试，我也可以用索引2访问同一元素。
SYSSTAT views containing the table, column, and index statistics.
SYSSTAT视图，包含表、列和索引统计数据。
By adding the index on the ACCT_ID_INX column, the new access plan shows a significant cost reduction from 3420.41 to 38.6219 timerons.
通过在ACCT _ ID _ IN x列上添加索引，新的访问计划显示了从3420.41到38.6219timeron的较大成本缩减。
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