Best practice - multiple server connects for different dB tables, or one server connect with a more complex dB query?

Hey all, just wondering what the best practice is for something like this, from both a stability but also performance perspective?

If I have 3 tables of data that need to be shown on a page - should I have 3 server connects, or should I have one server connect that attempts to get data from all 3 tables with reference links and a more complex query?