提取博客URL中的用户名

device_id	profile	blog_url
2138	180cm,75kg,27,male	http:/ur/bisdgboy777
3214	165cm,45kg,26,female	http:/url/dkittycc
6543	178cm,65kg,25,male	http:/ur/tigaer
4321	171 cm,55kg,23,female	http:/url/uhksd
2131	168cm,45kg,22,female	http:/url/sydney

根据示例，你的查询应返回以下结果：

device_id	user_name
2138	bisdgboy777
3214	dkittycc
6543	tigaer
4321	uhsksd
2131	sydney

示例1

输入:

drop table if exists user_submit;
CREATE TABLE `user_submit` (
`id` int NOT NULL,
`device_id` int NOT NULL,
`profile` varchar(100) NOT NULL,
`blog_url` varchar(100) NOT NULL
);
INSERT INTO user_submit VALUES(1,2138,'180cm,75kg,27,male','http:/url/bisdgboy777');
INSERT INTO user_submit VALUES(1,3214,'165cm,45kg,26,female','http:/url/dkittycc');
INSERT INTO user_submit VALUES(1,6543,'178cm,65kg,25,male','http:/url/tigaer');
INSERT INTO user_submit VALUES(1,4321,'171cm,55kg,23,female','http:/url/uhsksd');
INSERT INTO user_submit VALUES(1,2131,'168cm,45kg,22,female','http:/url/sysdney');

输出:

2138|bisdgboy777
3214|dkittycc
6543|tigaer
4321|uhsksd
2131|sysdney

原站题解

上次编辑到这里，代码来自缓存点击恢复默认模板

Mysql 解法, 执行用时: 36ms, 内存消耗: 6384KB, 提交时间: 2021-12-03

select device_id , substring_index(blog_url,'/',-1) as user_name from user_submit

Mysql 解法, 执行用时: 36ms, 内存消耗: 6388KB, 提交时间: 2022-01-27

select device_id,SUBSTRING_INDEX(blog_url,'/',-1)
from user_submit
#where

Mysql 解法, 执行用时: 36ms, 内存消耗: 6396KB, 提交时间: 2022-01-22

select 
device_id,
replace(blog_url,'http:/url/','') as user_name from user_submit;

Mysql 解法, 执行用时: 36ms, 内存消耗: 6408KB, 提交时间: 2021-12-06

select device_id,SUBSTRING_INDEX(blog_url,'url/','-1') as user_name
FROM user_submit

Mysql 解法, 执行用时: 36ms, 内存消耗: 6420KB, 提交时间: 2021-12-27

SELECT device_id,REPLACE(blog_url,'http:/url/','')user_name
FROM user_submit

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