What are all the start and end dates of the policies?
select start_date, end_date from policies
Give me the policy types instead.
select policy_type_code from policies
Just the deputy policies.
select policy_type_code from policies where policy_type_code = "Deputy"
Which customers have this policy? Give their names.
select distinct t2.customer_details from policies as t1 join customers as t2 on t1.customer_id = t2.customer_id where t1.policy_type_code = "Deputy"