99.99% of web developers deal with databases in their jobs, and with all the different databases in the market, it becomes hard to keep track of all their connectionstrings and the different options and attributes they have. One place where you can find more information about connection strings is
www.connectionstrings.com. You can find examples of connectionstrings for most of the datasources that you would deal with in your job.
Another tool that I find very usefull is the
BE.ConnectionString AddIn for VS.NET 2003. Its a VS.NET AddIn that is used to generate connectionstrings for SQL Server and Access databases.