Can I add 42 million SKUs ?

Can I add 42 million SKUs ?

State answer No.

A relational database can handle 42 millions data there is no problem.but
42million data equal to 240GB database. It will be make reindexes run forever.
Remember Performance will almost be all of your focus, more products in your
store means a slower store, with tweaks, caching etc you can improve the
performance, but how much you can will have to be tested.

If you have more question reply me.