复制代码
9. field group 之后 某一个字段以“，”分割形式展示
->group(id)->field(‘group_concat(score order by `score ` desc) as score‘)复制代码
10. group 之后 field 里面查询最新一条里面的数据
->group(‘status‘)->field(‘SUBSTRING_INDEX(group_concat(id order by `id` desc),",",1) as id‘)复制代码
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Thinkphp field() 数据库查询函数使用
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