mysql之group_concat函数详解

函数语法：

group_concat( [DISTINCT] 要连接的字段 [Order BY 排序字段 ASC/DESC] [Separator ‘分隔符’] )

下面举例说明：

select id,price from goods;  

 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;  

 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;  

 以id分组，把price字段的值去重打印在一行，逗号分隔，按照price倒序排列

select id,group_concat(DISTINCT price order by price desc) from goods group by id;