SELECT id, customer_name, amount_cents FROM purchase_order WHERE id = #{id} SELECT id, customer_name, amount_cents FROM purchase_order WHERE id = #{id} SELECT id, customer_name, amount_cents FROM purchase_order ORDER BY id SELECT id, customer_name, amount_cents FROM purchase_order ORDER BY id SELECT pg_backend_pid() UPDATE purchase_order SET amount_cents = #{amount} WHERE id = #{id} INSERT INTO purchase_order VALUES (1, 'Duplicate', 0)