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group-by

网络分组；分组操作；组群化

group-by

网络释义

group-by

分组

groupby – 分组（group-by）函数和属性, 对应 SetGroupBy() API 调用:... WHERE query='test;groupby=day:published_ts;'; ...

分组操作

当外层查询含有分组操作(GROUP-BY)时，子查询消除技术也可以适用。例如Q19, 这是一个TPC-H第11号查询的简化版本。

组群化

概观归纳(Roll- up)是藉由某个属性维度的组群化(group-by)来观看综整性的资料,也就是在语意层中较上层的聚合资料;细分层的 …

群组

...ized View)使查询最佳化。进而探讨汇总查询透过改写将群组(Group-by)移到连结之前(Push down)或之后(Pull up)处理，以提 …

例句：

The List To Group projection can only be used for lists, and it turns the list into a group by retaining only the first item of the list.

ListToGroup 映射仅可用于列表，它通过仅保留列表的第一个项目将列表转化成一个组。

Indicates that the data column is being used to create a grouped result set (is part of a GROUP BY clause ) in an aggregate query .

表示数据列用于在聚合查询中创建分组的结果集（GROUPBY 子句的一部分）。

One obvious improvement to the query in fraggle. py would be to group by source , rather than pursuing just a time-ordered display.

对 fraggle.py 中查询的一个明显改进是根据源进行分组，而不是单单根据时间顺序进行显示。

Liu Xin is all over the pseudo-group by ?

刘歆是否遍伪群经？

One of these operators (shown on the lower branch in Figure 4 ) feeds a Group By operator , which performs the aggregations shown in Table 1 .

其中一个操作符（图 4 中下方的分支）为一个 GroupBy 操作符提供输入，后者执行表 1 中所示的聚合。

If the associated data column is part of a GROUP BY clause , the expression you enter is used for a HAVING clause .

如果关联的数据列是 GROUPBY 子句的一部分，则输入的表达式用于 HAVING 子句。

If the field were a Text data type , you could choose to group by the entire field (Normal ), or perhaps by the first one to five characters.

如果字段是 “文本 ”数据类型，则可以选择按整个字段（“普通 ”）进行分组，也可以按最前面的一到五个字符进行分组。

Use the Group by drop-down menu on the right-side panel (Figure 21 ) to switch to the Folders view (if it is not the view already selected ).

使用在右边面板的 Groupby 拉下菜单（图 21 ）以切换到 Folders 视图（如果它不是目前已选择的视图）。

A column used in an expression of the SELECT clause must be in the GROUP BY clause .

在 SELECT 子句的表达式中使用的列必须位于 GROUPBY 子句中。

In the query , select the query clauses that you want to combine into a group by clicking the left-most cell in the rows .

在查询中，单击相应行中最左侧的单元格，选择要组合成一个组的查询子句。

To be accepted as a member of a group by denying one's own ancestry or background.

为被一个团体接受为成员掩盖自己的家世或背景

The main query does not contain a GROUP BY clause, and is not an aggregate query, or the subquery returns exactly one value .

主查询不包含 GROUPBY 子句并且不是汇总查询，或者子查询恰好返回一个值。

The GROUP BY keywords are followed by a list of columns , known as the grouping columns .

GROUPBY 关键字后跟一个列的列表，称为组合列。

Concentrated training shall be conducted for the chief executive officers (CEOs) of the key enterprises of the state group by group.

对国家重点企业的主要负责人分批进行集中培训。

And , once we begin using the RANDOM option, we must be very careful to code both a GROUP BY and an ORDER BY when order matters .

而且，一旦我们开始使用 RANDOM 选项，我们必须在排序至关重要时非常小心地编写 GROUPBY 和 ORDERBY 。

Specify the columns to be included in the generated GROUP BY clause , as shown in Figure 13 .

指定生成的 GROUPBY 子句中包括的列，如图 13 所示。

An expression on a column used in the GROUP BY clause, or an expression on the results of an aggregate .

在 GROUPBY 子句中使用的列的表达式或基于聚合结果的表达式。

The result sets of SELECT statements with a GROUP BY clause and no ORDER BY clause are sorted by the GROUP BY columns .

带 GROUPBY 子句但不带 ORDERBY 子句的 SELECT 语句的结果集，将按 GROUPBY 列排序。

group-by

group-by

分组

分组操作

组群化

群组

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