CREATE TABLE "operation" (
  "maximum_ceiling_temperature" text,
  "temperature_rating" text,
  "temperature_classification" text,
  "color_code_with_fusible_link" text,
  "glass_bulb_color" text
);

Question: What is the temperature classification of a purple colored glass bulb?
SQL: SELECT "temperature_classification" FROM "operation" WHERE "glass_bulb_color"='purple';

Question: What is the color code with a temperature classification of ordinary?
SQL: SELECT "color_code_with_fusible_link" FROM "operation" WHERE "temperature_classification"='ordinary';

Question: What is the temperature rating of the intermediate temperature classification?
SQL: SELECT "temperature_rating" FROM "operation" WHERE "temperature_classification"='intermediate';