Answer / guest

Cause: The capability in question is not supported when the
materialized view nests an aggregate function invocation as
an argument to another aggregate function.

Action: Re-phrase the query to avoid the nested aggregate
function invocation.

Please add more information about this Error

ORA-29501: invalid or missing Java source, class, or resource name

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ORA-30757: cannot access type information

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O2U-00212: An error occurred for which no message is available

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CLSR-01009: database management module failed to start

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NZE-29180: Unsupported validation protocol

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ORA-16504: The Data Guard configuration already exists.

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PLS-00254: OUT and IN/OUT modes cannot be used in this context

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ORA-27501: IPC error creating a port

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ORA-29537: class or resource cannot be created or dropped directly

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TNS-00106: Failed to open log file

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