So do many other entities.

Oracle does not control the specification of the language (ECMA does), nor does it own rights to the original implementation (I believe Mozilla does).

I don’t think that matters in the context of the JavaScript trademark. Within the context of the trademark Oracle does have business developing and selling JavaScript.

They also have business developing and selling multiple SQL implementations, does that mean they should get a trademark on the name SQL?

Yep, and it now features as a supported language in their latest database version. That might be another reason they continue to protect the trademark.