Is/was there any legit coin using SQL or Traditional database?

[prp-e]

Well, I know about the scammy One Coin thing.I just wonder, is there any actual coin using SQL or traditional databases instead of a blockchain? Although it wouldn't be a crypto currency and more like a voucher, but it could be some sort of project worth an investigation.

[TastyChillySauce00]

Only scam coins use SQL or traditional database, and like you said, it won't even qualify to be called cryptocurrency, so far I haven't really encountered one.
To be honest, I don't think it deserves to be considered "actual coin" as well, they should be called account balance, in that case Paypal and other cefi services are using relational databases.

There are techs that experimented on the use of relational database and blockchain consensus approach but they're just tech, I haven't seen any coin that used that technology yet.
I mean, when you use that kind of traditional database, the mutability, centralized control, and centralized single point of failure is what you gonna have.