SharePoint 2010 has a big limitation with Content Query Web Part to roll up content and we have to do good effort of work around as Content Query Web Part was limited to the Site Collection. In SharePoint 2010 we used the Content Query Web Part which helps us to see content instantly without waiting for the next crawl.
This drawback is eliminated in SharePoint 2013 using Content Search Web Part. Content Search Web part is available in the Web part>Content Roll Up>Content Search. This web part will allow you to create your own query easily and display the results the way.
Change Query in the Property Page will allow you to design your own query. The “Query Builder” has a nice UI that helps us to configure the query. “Switch to the Advanced Mode” in the “Query Builder” will provide more option to narrow down result.
A “Test Query” Option is available with the “Query Builder” which will provide a Preview of Result for whatever you configured.