These rankings are always strange to me. SQL is a declarative query syntax, and may be Turing complete but building complete software in SQL is not done. It's a domain-specific language. I'm not sure I'd call myself a programmer if I only knew SQL, I would probably say I was a DBA.

If you're going to toss SQL in on a programming list with C and C++, ok go for it, but I don't see how you can then leave off Bash or Powershell.

Either way on my nitpicks, the overall language used within the article is strange, like it's from a complete outsider to the industry.

Indeed, the combined popularity of C and the big C-like languages—C++, and C#—would outrank Python by some margin.

Everyone in this industry knows Python is C-like. Java is C-like. JS.

While most developers don't really know SQL and employers want it, that part is true. They don't want you enjoying those ORMs, and I am an ORM fan until it doesn't work. Even then when I'm writing SPs, I remain an ORM fan.

An aside, frontend development is where I see most people lacking that I know rather than SQL, including myself. Too many flavors of the month. I try to stay in the C# lane and have settled on Razor Pages/MVC and Blazor.