group_concat语法:
group_concat([DISTINCT] 要连接的字段 [Order BY ASC/DESC 排序字段] [Separator ‘分隔符’])
/*SUBSTRING_INDEX以逗号分隔,取第一个值*/
select SUBSTRING_INDEX(GROUP_CONCAT(stuName ORDER BY score ASC),',',1),
min(score) as score,
course
from
grade1
group by
course;
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作者:无形myself
来源:CSDN
原文:https://blog.csdn.net/u011280342/article/details/78285608
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