( by Chuck Whiteley III )
You will need to install script VMerge from Script Gallery.
Go to menu "Tools" > "Script gallery" and then search for "vmerge" and then install it.
After you have installed the script "VMerge", put the following formula in Cell A2 of "Combined":
=query(vmerge('ST'!A2:H;'SG'!A2:H);"select * where Col1<>'' ")