Dear Satalist

I am having difficulty opening and working with several huge data files in Stata. These are .txt files which are upwards fo 15GB each - they have around 300 variables and up to 16 million observations each, and I have around 20 of them (representing different years of data), which ideally I would like to append in to one master database. Does anyone have any advice as to how to do this within STATA, or which database software to use in order to then analyse the data in Stata?

Best Wishes

Joe