函數語法:

group_concat([DISTINCT] 要連接的字段 [ORDER BY 排序字段 ASC/DESC] [SEPARATOR ‘分隔符‘])

下面舉例說明:

select * from goods;

以id分組,把price字段的值在同一行打印出來,逗號分隔(默認)

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

以id分組,把price字段的值在一行打印出來,分紅分隔

SELECT id, group_concat(price separator ‘;‘) from goods group by id;

以id分組,把去除重復冗余的price字段的值打印在一行,以逗號分隔

select id, group_concat(distinct price) from goods group by id;

以id分組,把price字段的值打印在一行,逗號分隔,按照price倒序排列

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

mysql之group_concat函數詳解