group_concat( [DISTINCT] 要连接的字段 [Order BY 排序字段 ASC/DESC] [Separator ‘分隔符‘] )
1.
--以id分组,把price字段的值在同一行打印出来,逗号分隔(默认) select id, group_concat(price) from goods group by id;
2.
--以id分组,把price字段的值在一行打印出来,分号分隔 select id,group_concat(price separator ‘;‘) from goods group by id;
3.
--以id分组,把去除重复冗余的price字段的值打印在一行,逗号分隔 select id,group_concat(distinct price) from goods group by id;
4.
--以id分组,把price字段的值打印在一行,逗号分隔,按照price倒序排列 select id,group_concat(price order by price desc) from goods group by id;
原文地址:https://www.cnblogs.com/chenze-Index/p/10130637.html
时间: 2024-10-08 20:35:29