mysql中位数计算方式
2022/8/6 2:22:46
本文主要是介绍mysql中位数计算方式,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
mysql中位数计算方式 1、建表drop table test_cunchu.score; create table test_cunchu.score( id int not null primary key auto_increment, score decimal(10,2) not null );
2、插入数据
insert into test_cunchu.score (score) values (89.4); insert into test_cunchu.score (score) values (82.5); insert into test_cunchu.score (score) values (65); insert into test_cunchu.score (score) values (98); insert into test_cunchu.score (score) values (92); insert into test_cunchu.score (score) values (34); insert into test_cunchu.score (score) values (59); insert into test_cunchu.score (score) values (83); insert into test_cunchu.score (score) values (88); insert into test_cunchu.score (score) values (63); insert into test_cunchu.score (score) values (100); insert into test_cunchu.score (score) values (96); insert into test_cunchu.score (score) values (68); insert into test_cunchu.score (score) values (56);
3、中位数查询
select round(sum(score) / count(*),2) as midean from ( select score, row_number() over (order by score desc) as desc_Math, row_number() over (order by score asc) as asc_Math from test_cunchu.score ) as order_table where asc_Math in (desc_Math, desc_Math + 1, desc_Math - 1);
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