MySQL 查询统计两张表数据并合并显示

order 表

CREATE TABLE `lyh_order` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `user_id` bigint(20) NOT NULL,
  `order_sn` varchar(128) COLLATE utf8mb4_bin NOT NULL DEFAULT ''

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转载自blog.csdn.net/wwj256/article/details/130306802