| select customer.education as c0 from customer as customer, sales_fact_1997 as sales_fact_1997, time_by_day as time_by_day where sales_fact_1997.customer_id = customer.customer_id and sales_fact_1997.time_id = time_by_day.time_id and (time_by_day.quarter in ('Q1', 'Q2', 'Q3', 'Q1', 'Q2', 'Q3') and time_by_day.the_year in (1997, 1998)) group by customer.education order by customer.education ASC NULLS LAST; |