CREATE TABLE customers_policies (date_opened VARCHAR, date_closed VARCHAR, customer_id VARCHAR)
CREATE TABLE customers (customer_id VARCHAR, customer_name VARCHAR)

Retrieve the open and close dates of all the policies associated with the customer whose name contains 'Diana
SELECT t2.date_opened, t2.date_closed FROM customers AS t1 JOIN customers_policies AS t2 ON t1.customer_id = t2.customer_id WHERE t1.customer_name LIKE "%Diana%"
SELECT "t2"."date_opened", "t2"."date_closed" FROM "customers" AS "t1" JOIN "customers_policies" AS "t2" ON "t1"."customer_id" = "t2"."customer_id" WHERE "t1"."customer_name" LIKE "%Diana%"