ORA-30370: set operators are not supported in this context
Cause: A set operator such as UNION, UNION ALL, INTERSECT, or MINUS was encountered in an unsupported context, such as in a materialized view definition.
Action: Re-specify the expression to avoid the use of set operators.
Cause: A set operator such as UNION, UNION ALL, INTERSECT, or MINUS was encountered in an unsupported context, such as in a materialized view definition.
Action: Re-specify the expression to avoid the use of set operators.
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