Oracle教程 2023-02-24

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

本站中文解释

Oracle视图ALL_ANALYTIC_VIEW_COLUMNS用于描述当前用户拥有的所有分析视图的列，分析视图可以将子查询的结果展示为可访问的视图，可以使用该视图访问当前会话的分析视图的列以及元数据信息。它返回的列包括：

VIEW_NAME：分析视图的名称。
COLUMN_NAME：分析视图中列的名称。
COLUMN_POSITION：分析视图中列出现的位置，从1开始计数。
COLUMN_EXPRESSION：分析视图中定义的列表达式。
COLUMN_DATA_TYPE：分析视图中列的数据类型。

使用该视图查看当前用户拥有的分析视图及其列如下：
SELECT * FROM ALL_ANALYTIC_VIEW_COLUMNS;

官方英文解释

ALL_ANALYTIC_VIEW_COLUMNS describes the columns of the analytic views accessible to the current user.

Related Views

DBA_ANALYTIC_VIEW_COLUMNS describes the columns of all analytic views in the database.
USER_ANALYTIC_VIEW_COLUMNS describes the columns of the analytic views 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).

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官方英文解释

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