文章目录

• 1 概述
• 2 示例
• 3 扩展
• • 3.1 字符串拼接

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with city as(select 1 sno, '湖北省' address, 1 order_no from dual union allselect 1 sno, '武汉市' address, 2 order_no from dual union allselect 1 sno, '嘉鱼县' address, 3 order_no from dual union allselect 2 sno, '广东省' address, 1 order_no from dual union allselect 2 sno, '深圳市' address, 2 order_no from dual
)
select c.sno,group_concat(c.address) 默认逗号分隔,group_concat(c.address separator '-') 自定义分隔,group_concat(c.address order by c.order_no desc separator '-') 排序from city cgroup by c.sno;

sno      默认逗号分隔          自定义分隔          排序
1       湖北省,武汉市,嘉鱼县 湖北省-武汉市-嘉鱼县  嘉鱼县-武汉市-湖北省
2       广东省,深圳市         广东省-深圳市        深圳市-广东省