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

Oracle视图ALL_MINING_MODEL_XFORMS显示了当前用户的所有使用的数据挖掘中的变换。变换是对XML格式的挖掘模型中输入列或输出列所做的特殊处理，以改善分析结果的质量。

变换是使用Oracle数据挖掘的基本构建块，包括聚类、预测等等。有时也会将它们用于数据清理或者错误数据补偿等等。

要使用该视图，可以编写查询，用于检索与特定模型相关联的变换信息。这个视图还可以用来清除不必要的或不正确的变换。

ALL_MINING_MODEL_XFORMS describes the user-specified transformations embedded in all models accessible to the user.

Related Views

DBA_MINING_MODEL_XFORMS describes the user-specified transformations embedded in all models accessible in the system.
USER_MINING_MODEL_XFORMS describes the user-specified transformations embedded with the user’s own models. This view does not display the OWNER column.

Column	Datatype	NULL	Description
`OWNER`	`VARCHAR2(128)`	`NOT NULL`	Name of the model owner
`MODEL_NAME`	`VARCHAR2(128)`	`NOT NULL`	Name of the model
`ATTRIBUTE_NAME`	`VARCHAR2(128)`		Name of the attribute used in the transformation
`ATTRIBUTE_SUBNAME`	`VARCHAR2(4000)`		Subname of the attribute used in the transformation
`ATTRIBUTE_SPEC`	`VARCHAR2(4000)`		Attribute specification provided to model training
`EXPRESSION`	`CLOB`		Transformation expression provided to model training
`REVERSE`	`VARCHAR2(3)`		Indicates whether the specified transformation is a reverse transformation (`YES`) or a forward expression (`NO`)