What public SQL DBMS' do people use for classes or workshops? I found this in a posting by Jim Hester on GitHub, but I'm not clear whether it's legit to use it widely:
con <- dbConnect(odbc::odbc(),
driver = "libtdsodbc.so",
database = "AdventureWorks2012",
uid = "sqlfamily",
pwd = "sqlf@m1ly",
Server = "mhknbn2kdz.database.windows.net",
port = 1433)
I know SQLite would be a possibility, but are there others?