I refer a Link https://jazz.net/wiki/bin/view/Main/QueryDevGuide.  In that example 2 :Find Potential Duplicates from the Command Line. which is standalone application. I suppose I want add that same query example in RTC client rather than execute on command Line. Is this Possible to add that  Program query in RTC  client. same Like  the Predefined query in RTC ?

That is not even a query, that is an Expression. From that expression, you could probably create a query and save it like this:

        IQueryCommon queryCommon = (IQueryCommon) teamRepository
                .getClientLibrary(IQueryCommon.class);
        IQueryDescriptor descriptor = queryCommon.createQuery(projectArea,
                "MyQuery Type " + workitemTypeID, "MyQuery Description",
                myExpression);
        queryCommon.save(descriptor, monitor);
      
        // OR
       IQueryClient queryClient = workItemClient.getQueryClient();
        queryClient.save(descriptor, monitor);