WikiMatrix lists a plethora of features for each wiki engine. Select a feature from the list below to get some in-depth description and feel free to improve the documentation
Does the wiki support SQLite databases for storing wiki content?
SQLite is an increasingly popular database for open source web applications, because PHP has started to integrate very well it, and it is very simple and 'lite', since it just writes its information to a single db file.
MySQL has always been the old favourite for integrating with PHP, but SQLite may begin to usurp it. However most web hosting services provide MySQL in preference to SQLite. In theory compatibility between the two should be pretty good (a wiki using MySQL should run using SQLite), and many wiki projects would no doubt welcome some guinea pigs to try this out and iron out the problems.
Install sqlite on your webserver, or check if your web host provides it before attempting to install such a wiki. You may prefer a wiki which uses Text Files for storage (although many web hosts do not allow file writing operations, so you must also check this)