Oracle教程 2023-02-25

Oracle 视图 ALL_ANALYTIC_VIEW_COLUMNS_AE 官方解释，作用，如何使用详细说明

本站中文解释

Oracle视图是Oracle数据库中的一种数据结构，可以将多个表的数据以及连接（称为联接）中的数据汇总在一起，使用者无需关心数据在哪张表中存放，而只需关心与自己需求相关的数据。ALL_ANALYTIC_VIEW_COLUMNS_AE视图显示了Advanced Analytics Option模块可以用来对数据库中的特定列(columns)进行分析的信息，范围包括表名，列名，可用于分析的列属性，方法，输入和输出数据类型以及可传入的参数的类型。

使用ALL_ANALYTIC_VIEW_COLUMNS_AE视图的工作流程如下：

1. 通过SELECT * FROM ALL_ANALYTICS_VIEW_COLUMNS_AE获取所有列的信息。

2. 使用WHERE子句来筛选想要的信息，可以使用的过滤器包括表名，列名，数据类型等等。

3. 根据过滤结果调用想要的数据分析方法。

4. 可以使用Oracle Analytic Option提供的参数，定制获得感兴趣的数据或分析结果。

官方英文解释

ALL_ANALYTIC_VIEW_COLUMNS_AE describes the columns of the analytic views (across all editions) accessible to the current user.

Related Views

DBA_ANALYTIC_VIEW_COLUMNS_AE describes the columns of all analytic views (across all editions) in the database.
USER_ANALYTIC_VIEW_COLUMNS_AE describes the columns of the analytic views (across all editions) owned by the current user. This view does not display the OWNER column.

Column	Datatype	NULL	Description
`OWNER`	`VARCHAR2(128)`	`NOT NULL`	Owner of the analytic view
`ANALYTIC_VIEW_NAME`	`VARCHAR2(128)`	`NOT NULL`	Name of the analytic view
`DIMENSION_NAME`	`VARCHAR2(128)`		Alias of the analytic view dimension in the analytic view; for a measure the value is `MEASURES`
`HIER_NAME`	`VARCHAR2(128)`		Alias of the analytic view hierarchy within `DIMENSION_NAME` in the analytic view; for a measure the value is `MEASURES`
`COLUMN_NAME`	`VARCHAR2(128)`	`NOT NULL`	Name of the column
`ROLE`	`VARCHAR2(4)`	`NOT NULL`	The role the attribute plays in the analytic view: `KEY` `AKEY` `HIER` `PROP` `MEAS`
`DATA_TYPE`	`VARCHAR2(106)`	`NOT NULL`	Datatype of the column
`DATA_LENGTH`	`NUMBER`	`NOT NULL`	Length of the column (in bytes)
`DATA_PRECISION`	`NUMBER`		Decimal precision for the `NUMBER` datatype; binary precision for the `FLOAT` datatype, NULL for all other datatypes
`DATA_SCALE`	`NUMBER`		Number of digits to the right of the decimal point in a number
`NULLABLE`	`CHAR(1)`	`NOT NULL`	Indicates whether a column allows NULL values; the value is `N` if there is a `NOT` `NULL` constraint on the column or if the column is part of a `PRIMARY` `KEY`
`CHARACTER_SET_NAME`	`VARCHAR2(44)`		Name of the character set: `CHAR_CS` `NCHAR_CS`
`CHAR_COL_DECL_LENGTH`	`NUMBER`		Declaration length of the character type column
`CHAR_USED`	`VARCHAR2(1)`		Indicates that the column uses `BYTE` length semantics (`B`) or `CHAR` length semantics (`C`), or whether the datatype is not any of the following (NULL): `CHAR` `VARCHAR2` `NCHAR` `NVARCHAR2`
`ORDER_NUM`	`NUMBER`	`NOT NULL`	Order of the column, with the hierarchy columns first followed by measure columns. The columns for a hierarchy are grouped together, listed in their order in the `HIERARCHIES` clause of the analytic view definition. Within a hierarchy, attributes are listed first in order of their definition in the `ATTRIBUTES` clause of the attribute dimension definition followed by hierarchical attributes in the `DIMENSION` `BY` clause of the analytic view.
`ORIGIN_CON_ID`	`NUMBER`		The ID of the container where the data originates. Possible values include: `0`: This value is used for rows in non-CDBs. This value is not used for CDBs. n: This value is used for rows containing data that originate in the container with container ID n (n = 1 if the row originates in root).
`EDITION_NAME`	`VARCHAR2(128)`		Name of the application edition where the analytic view is defined

Note:

This view is available starting with Oracle Database release 21c, version 21.5.

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