CREATE TABLE "belt_changes_april_2010_figures_not_avai" (
  "feb_2010" text,
  "mar_2010" text,
  "may_2010" real,
  "jun_2010" real,
  "jul_2010" real,
  "aug_2010" real,
  "sep_2010" real,
  "oct_2010" real,
  "nov_2010" real,
  "dec_2010" real,
  "jan_2011" real,
  "feb_2011" real,
  "mar_2011" real,
  "apr_2011" real,
  "may_2011" real,
  "jun_2011" real,
  "jul_2011" real,
  "aug_2011" real,
  "sep_2011" real,
  "oct_2011" real,
  "nov_2011" real,
  "dec_2011" real,
  "jan_2012" real,
  "feb_2012" real,
  "mar_2012" real,
  "apr_2012" real,
  "may_2012" real,
  "jun_2012" real,
  "jul_2012" real,
  "aug_2012" real,
  "sep_2012" real,
  "oct_2012" real,
  "nov_2012" real,
  "dec_2012" real,
  "jan_2013" real,
  "feb_2013" real,
  "mar_2013" real,
  "apr_2013" real,
  "may_2013" real,
  "jun_2013" real,
  "jul_2013" real,
  "aug_2013" real,
  "sep_2013" real,
  "oct_2013" real
);

Question: What is the highest Aug 2013 with a Nov 2011 smaller than 968, and a Jul 2012 with 31, and a Jun 2011 larger than 30?
SQL: SELECT MAX("aug_2013") FROM "belt_changes_april_2010_figures_not_avai" WHERE "nov_2011"<968 AND "jul_2012"=31 AND "jun_2011">30;

Question: What is the average Apr 2013 with a Jun 2011 less than 14?
SQL: SELECT AVG("apr_2013") FROM "belt_changes_april_2010_figures_not_avai" WHERE "jun_2011"<14;

Question: What is the average Feb 2013 with a Feb 2010 with 37, and a Nov 2012 less than 32?
SQL: SELECT AVG("feb_2013") FROM "belt_changes_april_2010_figures_not_avai" WHERE "feb_2010"='37' AND "nov_2012"<32;

Question: What is the total number with Nov 2012 with a Jun 2013 larger than 542, and a Aug 2011 more than 935?
SQL: SELECT COUNT("nov_2012") FROM "belt_changes_april_2010_figures_not_avai" WHERE "jun_2013">542 AND "aug_2011">935;