SQL基础篇(汇总)刷题传送门

题目链接

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题面

样例输入

drop table if exists user_profile;
CREATE TABLE `user_profile` (
`id` int NOT NULL,
`device_id` int NOT NULL,
`gender` varchar(14) NOT NULL,
`age` int ,
`university` varchar(32) NOT NULL,
`province` varchar(32)  NOT NULL);
INSERT INTO user_profile VALUES(1,2138,'male',21,'北京大学','BeiJing');
INSERT INTO user_profile VALUES(2,3214,'male',null,'复旦大学','Shanghai');
INSERT INTO user_profile VALUES(3,6543,'female',20,'北京大学','BeiJing');
INSERT INTO user_profile VALUES(4,2315,'female',23,'浙江大学','ZheJiang');
INSERT INTO user_profile VALUES(5,5432,'male',25,'山东大学','Shandong');

样例输出

1|2138|male|21|北京大学|BeiJing
2|3214|male|None|复旦大学|Shanghai
3|6543|female|20|北京大学|BeiJing
4|2315|female|23|浙江大学|ZheJiang
5|5432|male|25|山东大学|Shandong

题意理解

输出所有的列信息即可

代码 

select * from user_profile