> knows SQL If by that you mean, “knows the commands to create, fill, and select from a table,” then yes. If you mean, “knows how to create a performant schema

> knows SQL If by that you mean, “knows the commands to create, fill, and select from a table,” then yes. If you mean, “knows how to create a performant schema and queries that will serve them well into the future,” then no, absolutely not. OTOH, IME data folk are much more cheerful and willing to change things than devs when I point out the innumerable ways their DB choices are choking them. Devs more often fall on the side of “we don’t have time for that on our roadmap; can’t you just fix it?”