I'm using this for my class but have issues:
1. Joins - They seem to work sporadically - so not in Firefox but Chrome. Sometimes they error out even in Chrome. Suggestions?
2. I want to make a few tables to illustrate the different joins - right now the tables are not that different so you can join but students don't see the difference. Can I make a few of my own and if so will they stay. Seems to get wiped out when web refreshed.
3. Any suggestions for how to use in my class to make a nicer experience would be SO HELPFUL AND MUCH APPRECIATED!