Welcome to the Xcalar family! We are very excited to have you try out Xcalar. Have you tried our any of our extensions yet? From the bottom left menubar, click on the top most icon that looks like a jigsaw piece. Do you see an option that says Union All? If you don't see it, please contact your Xcalar Admin to install the Union All extension onto your cluster. Please forward him the following instructions:
1. Click on Monitor -> Extensions
2. Click on the Install icon next to the "Union All" extension
And that's it. Once it's been installed, it will be available to all users. To use the extension, simply select the top and the bottom tables and it will generate the union of the two tables.