mysql按组区分
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mysql实现按组区分后获取每组前几名的sql写法
目录一、创建表，插入相关测试数据二、查询每科成绩前三的记录三、查询学生各科分数大于等于90分的记录1. 第一种写法：正向思考2. 第二种写法：逆向思考总结遇到一个场景，要把数据分组，然后获取每组前10条数据，首[详细]
2023-03-21 09:31 分类：数据库 iphone app submission process [closed]
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2022-12-28 15:25 分类：问答
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