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ORA-30455: summary contains VARIANCE without corresponding SUM & COUNT ORACLE 报错故障修复远程处理

2023-11-05 05:03

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文档解释

ORA-30455: summary contains VARIANCE without corresponding SUM & COUNT

Cause: Incremental refresh of summaries with VARIANCE(X) requires COUNT(X) and SUM(X) columns to be included in the summary definition

Action: Make sure that the required columns are part of the summary definition if incremental refresh capability is desired.

ORA-30455错误消息表明，SUM和COUNT子句之外没有指定VARIANCE子句，无法计算方差。

官方解释

ORA-30455被抛出，当ASSESSMENT_SUMMARY_VIEW视图中指定了VARIANCE子句，但没有指定SUM和COUNT子句时。

常见案例

这个错误最常见的是在构建一个用于计算方差的查询中，用户忘记将统计SUM和COUNT子句添加到其中。

一般处理方法及步骤

为查询添加SUM和COUNT子句，这将允许查询计算方差。

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报错故障 summary

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ORA-30455: summary contains VARIANCE without corresponding SUM & COUNT ORACLE 报错故障修复远程处理

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