CREATE TABLE policies (policy_id NUMBER, customer_id NUMBER, policy_type_code CLOB, start_date TIME, end_date TIME)
CREATE TABLE customers (customer_id NUMBER, customer_details CLOB)
CREATE TABLE claims_documents (claim_id NUMBER, document_type_code CLOB, created_by_staff_id NUMBER, created_date NUMBER)
CREATE TABLE claims_processing (claim_processing_id NUMBER, claim_id NUMBER, claim_outcome_code CLOB, claim_stage_id NUMBER, staff_id NUMBER)
CREATE TABLE claims_processing_stages (claim_stage_id NUMBER, next_claim_stage_id NUMBER, claim_status_name CLOB, claim_status_description CLOB)
CREATE TABLE staff (staff_id NUMBER, staff_details CLOB)
CREATE TABLE claim_headers (claim_header_id NUMBER, claim_status_code CLOB, claim_type_code CLOB, policy_id NUMBER, date_of_claim TIME, date_of_settlement TIME, amount_claimed NUMBER, amount_piad NUMBER)

What are the names of the customers and staff members?
SELECT customer_details FROM customers UNION SELECT staff_details FROM staff
SELECT "customer_details" FROM "customers" UNION SELECT "staff_details" FROM "staff"