What is smallest Khmer valued less than 90 have a kau sip ALA-LC?
CREATE TABLE "numbers_from_30_90" (
  "value" real,
  "khmer" real,
  "word_form" text,
  "ungegn" text,
  "ala_lc" text,
  "other" text
);
SELECT MIN("khmer") FROM "numbers_from_30_90" WHERE "ala_lc"='kau sip' AND "value"<90;