Question: How many different index numbers are there for an ozone, running 8 hourly mean of 66-99?
SQL: SELECT COUNT("Index") FROM "1-1942366-7" WHERE "Ozone, Running 8 hourly mean (μg/m 3 )" = '66-99';

Question: What's the count of pm 10 particles when the pm 2.5 particles are at 59-66?
SQL: SELECT "PM10 Particles, 24 hour mean (μg/m 3 )" FROM "1-1942366-7" WHERE "PM2.5 Particles, 24 hour mean (μg/m 3 )" = '59-66';

Question: What's the number of pm10 particles when sulphur dioxide is at 266-354?
SQL: SELECT "PM10 Particles, 24 hour mean (μg/m 3 )" FROM "1-1942366-7" WHERE "Sulphur Dioxide, 15 minute mean (μg/m 3 )" = '266-354';

Question: What's the sulphur dioxide count when the ozone is at 121-140?
SQL: SELECT "Sulphur Dioxide, 15 minute mean (μg/m 3 )" FROM "1-1942366-7" WHERE "Ozone, Running 8 hourly mean (μg/m 3 )" = '121-140';

Question: What's the sulphur dioxide count when the nitrogen dioxide is 468-534?
SQL: SELECT "Sulphur Dioxide, 15 minute mean (μg/m 3 )" FROM "1-1942366-7" WHERE "Nitrogen Dioxide, Hourly mean (μg/m 3 )" = '468-534';

Question: What's the nitrogen dioxide count where the sulphur dioxide is at 0-88?
SQL: SELECT "Nitrogen Dioxide, Hourly mean (μg/m 3 )" FROM "1-1942366-7" WHERE "Sulphur Dioxide, 15 minute mean (μg/m 3 )" = '0-88';