GaussDB高斯数据库解决多表联查分组问题

1. **通过 group_concat( )函数 **
   例如：group_concat(a.shopintroduction)
   或者： substring_index(group_concat(distinct b.operatorname),’,’,1) operatorname,
   最后直接group by 主表所有的参数就行。

SELECT a.starttime,group_concat(a.shopintroduction )  FROM s_online_shop_info a 
   left join s_online_seller s on a.sellerid = s.id  
   LEFT JOIN s_online_shop_credentials b ON a.id = b.shopid 
   LEFT JOIN s_online_shop_ticket c ON a.id = c.shopid WHERE 1 = 1 
AND a.productcategory = 1  AND a.type = 1 GROUP BY (a.starttime)