CREATE TABLE "criteria" (
  "currency" text,
  "code" text,
  "entry_erm_ii" text,
  "central_rate" text,
  "official_target_date" text
);

Question: What type of currency has a code of SEK?
SQL: SELECT "currency" FROM "criteria" WHERE "code"='sek';

Question: What code is used to represent the currency of Croatian Kuna?
SQL: SELECT "code" FROM "criteria" WHERE "currency"='croatian kuna';