This might be handy
Jeroen Swart, one of the most capable and knowledgable Microsoft .NET Professionals I know, provided me with a pointer to www.connectionstrings.com. This site lists connection string formats for a whole bunch of databases. Of course, Oracle, MySQL and MS SQL are there, as are Postgres and DB2.
But what about Mimer? Lightbase? Right, that's why you might visit them.
Actually, there are also some products missing, like HSQL and SQLite and what have you. And they could pick a nicer Icon for MySQL. Otherwise, handy site.