Table: dorval_population
Columns: mother_tongue
population_2006
percentage_2006
population_2011
percentage_2011

Question: What is every value for population (2006) with a Romanian mother tongue?
SQL: SELECT "population_2006" FROM dorval_population WHERE "mother_tongue" = 'Romanian'

Question: What is the lowest population(2011)?
SQL: SELECT MIN("population_2011") FROM dorval_population

Question: What is the lowest population(2006) when there is a 1.06% in 2011?
SQL: SELECT MIN("population_2006") FROM dorval_population WHERE "percentage_2011" = '1.06%'

Question: How many values for population(2011) correspond to a 1.40% in 2006?
SQL: SELECT COUNT("population_2011") FROM dorval_population WHERE "percentage_2006" = '1.40%'

Question: What is every value for percentage(2006) with a Polish mother tongue?
SQL: SELECT "percentage_2006" FROM dorval_population WHERE "mother_tongue" = 'Polish'