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
        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
        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.