ORA-01441
        cannot decrease column length because some value is too big
        
        
        Cause
        An ALTER TABLE MODIFY statement attempted to decrease the size of a character field containing data. A column whose maximum size was decreased must contain only NULL values.
        Action
        Set all values in column to NULL before decreasing the maximum size.
        
     
    
    
        ORA-01441
        cannot decrease column length because some value is too big
        
        
        Cause
        An ALTER TABLE MODIFY statement attempted to decrease the size of a character field containing data. A column whose maximum size was decreased must contain only NULL values.
        Action
        Set all values in column to NULL before decreasing the maximum size.
        
     
    
    
        ORA-01441
        cannot decrease column length because some value is too big
        
        
        Cause
        An ALTER TABLE MODIFY statement attempted to decrease the size of a character field containing data. A column whose maximum size was decreased must contain only NULL values.
        Action
        Set all values in column to NULL before decreasing the maximum size.