CREATE TABLE "demographics" (
  "mother_tongue" text,
  "population_2006" real,
  "percentage_2006" text,
  "population_2011" real,
  "percentage_2011" text
);

Question: How many percentages (2006) are there for the population whose mother tongue is French?
SQL: SELECT COUNT("percentage_2006") FROM "demographics" WHERE "mother_tongue"='French';

Question: What was the minimum population in 2011?
SQL: SELECT MIN("population_2011") FROM "demographics";

Question: What was the percentage in 2006 whose natives is Polish?
SQL: SELECT "percentage_2006" FROM "demographics" WHERE "mother_tongue"='Polish';