1、多列查询

SELECT
  t.productName,
  s.*
FROM
  insure_order t,
  insure_order_subinfo s
WHERE t.id = s.orderId;
 

 2、多列转行

SELECT
  t.productName,
  GROUP_CONCAT(s.name, ':', s.content) 列转行信息
FROM
  insure_order t,
  insure_order_subinfo s
WHERE t.id = s.orderId
GROUP BY t.id;