Table: otago_schools
Columns: name
years
gender
area
authority
decile
roll

Question: What's the school name in Balclutha that has a Decile of 7 and a roll larger than 186?
SQL: SELECT "name" FROM otago_schools WHERE "area" = 'balclutha' AND "decile" < 7 AND "roll" > 186

Question: Which school in Balclutha has a roll smaller than 55?
SQL: SELECT "name" FROM otago_schools WHERE "area" = 'balclutha' AND "roll" < 55