Another such language is [Raku](https://docs.raku.org/language/operators) (formerly known as Perl6), including such operators as `≠` `≤` `≥` `≅` `∈` `∉` `∋` `∌` `⊂` `⊄` `⊃` `⊅` `⊆` `⊈` `⊇` `⊉` `≼` `≽` and other syntax elements like `｢｣` `«»`, but while it presents some compelling and interesting ideas, it's removed too far from SQL to be considered an argument in favour of adding such operators to SQLite.