I have a Wordpress Multisite installation, and the root domain is set to root-domain.com. I would like to switch it with one of the sites of the network (site-in-network.com), and make it a root domain.
This way site-in-network.com would become the root domain, and root-domain.com would become one of the sites in the network (100+ sites).
I've done search and replace on a database before, and it worked, but I was dropping a domain all together, so I just replaced domain-a.com with domain-b.com. This time it is different, I want to keep both of them, and just switch the positions in the database.
I guess I would need to run a MySQL query. As far as I know, the root domain was set to something like "www.root-domain.com", and all other sites in the network were like "site-in-network.com" (without the .www part)
The database is about 0.5GB, so it would be good to get it right the first time.
I haven't done this before, but the approach I would start with in mind would be to use PHP and "UPDATE Table SET col_with_network_sites='root-domain' WHERE col_with_network_sites='site-in-network" then "UPDATE Table SET root_domain_col='site-in-network'"
Hope it gives you an idea or two.
BTW Sorry no one got back to you in over a month with any ideas. I'll have to try to remember to check in here more often since I can usually at least 'throw a dart' at issues with MySQL.