altsql.org
SQL dialects differ in ways that cause real pain, and a neutral body documenting that would be valuable. Compatibility is the most useful reading here.
On the .org the open-source angle comes forward, and that’s where a great deal of the interesting work in this space actually happens. Several of the most significant database projects are foundation-governed open source, and that world uses this extension as standard.
The ecosystem justifies the attention. SQL is fifty years old and the landscape around it has never been more active: distributed engines, query layers over object storage, and a continuous supply of alternatives to the incumbents.
The name suits an open-source project, a standards or compatibility initiative, a community resource, a benchmarking project, or a technical publication.
Six characters, no hyphen, immediately legible, with the .org signalling community rather than vendor.
The name is listed. Enquiries welcome.