Return every compound that contains nitrogen and contains no oxygen, with its name and formula, ordered by name. The formula answers both halves, but a symbol is not a letter: N also begins Ni and Na, so N only counts when the character after it is not a lowercase letter. GLOB takes a character class such as [^a-z], and NOT turns the oxygen match into an absence. Seventy-six compounds answer this.
A intermediate exercise, answered in SQL. It is marked by the rows your query returns rather than by how you wrote it, with 3 hints if you want them.
Ask the same question of a chemical dataset in SQL and in Mango and compare the two answers. The database is a SQLite file your browser downloads once and queries locally, so nothing you write ever leaves your machine — which is also why the tool needs JavaScript.