Discussion on:

SOLID design principles improve object-oriented development

In this paragraph I am somewhat confused about "Instead, you pass in a connection that is already configured, and in this way, the database can change without needing to retest the entire data set object."

Should I be doing the latter as opposed to the previous?
"The temptation is to pass in the database connection information to the data set and let it make the connection."

a very unprofessional article for Techrepublic.