Return every compound whose formula contains bromine, with its name and its formula, ordered by name. A formula is a string such as C8H9BrO, so the question is a pattern match on compounds.formula. SQLite has two: LIKE ignores case and writes % for any run of characters, GLOB keeps case and writes *. Thirty compounds answer this, 2,3,5-Tribromothiophene among them.
A beginner 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.