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MYSQL---查询成绩为前5名的学生
2022-07-06 00:52:00 【晚风吹儿】
需求:查询成绩为前5名的学生
拿到需求后,先对需求进行分析,找出筛选的条件
一、Mysql查询
1、最基本的查询
select * from table where name="panpan"
2、查前5名
在mysql中筛选数据的前几名,可以用关键字:limit
select * from table where name="panpan" limit 1
说明:查询表中名为panpan的第一条记录
3、以什么条件进行筛选,需求是以成绩进行筛选,则可以用order by 排序筛选
select * from table where order by grade
二、查询应用
合并后查询:
select * from score order by grade limit 5
说明:查询到score表里的grade ,以grade筛选,提取出前5条记录
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