Most of the article oriented databases from Hatfield Library provide a mixture of FULL TEXT documents and ABSTRACT only citations.
In order to quickly find FULL TEXT only documents, most database offer an option to RESTRICT RESULTS to only show you full text documents which are available with just 1 additional click.
Usually this "full text only" option requires a simple check mark.
Some article oriented databases are 100% full text, such as JSTOR and PROJECT MUSE.