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

Question: What is the Whakamaru school's authority?
SQL: SELECT "authority" FROM hilltop_school WHERE "name" = 'whakamaru school'

Question: Where is the school with state authority that has a roll of more than 157 students?
SQL: SELECT "area" FROM hilltop_school WHERE "authority" = 'state' AND "roll" > 157