CREATE TABLE "euro_norm_emissions_for_category_n3_edc_" (
  "standard" text,
  "date" text,
  "co_g_k_wh" text,
  "no_x_g_k_wh" text,
  "hc_g_k_wh" text,
  "pm_g_k_wh" text
);

Question: How many different standards have a PM of 0.02 g/kWh?
SQL: SELECT COUNT("standard") FROM "euro_norm_emissions_for_category_n3_edc_" WHERE "pm_g_k_wh"='0.02';

Question: What's the HC for the Euro I standard?
SQL: SELECT "hc_g_k_wh" FROM "euro_norm_emissions_for_category_n3_edc_" WHERE "standard"='Euro I';

Question: What's the HC for the standard with NO x of 7.0 g/kWh?
SQL: SELECT "hc_g_k_wh" FROM "euro_norm_emissions_for_category_n3_edc_" WHERE "no_x_g_k_wh"='7.0';

Question: What's the PM for the standard with 12.3 g/kWh CO?
SQL: SELECT "pm_g_k_wh" FROM "euro_norm_emissions_for_category_n3_edc_" WHERE "co_g_k_wh"='12.3';

Question: What's the NO of the standard with HC of 1.23 g/kWh?
SQL: SELECT "no_x_g_k_wh" FROM "euro_norm_emissions_for_category_n3_edc_" WHERE "hc_g_k_wh"='1.23';