sql進階操作

同樣也是用於記錄以便日後聯絡用！裡面基本包含了一般sql的進階用法！

drop table if exists stu;create table stu(name varchar(30),age int,stuid int not null PRIMARY key AUTO_INCREMENT,idnum int,sex varchar(30),check(sex in ('男','女')))charset=utf8;insert into stu (name,age,idnum,sex)VALUES('damon',789,4678945,'男');insert into stu (name,age,idnum,sex) VALUES('coco',13,345,'女');insert into stu (name,age,idnum,sex)values('kitty',13,46,'女');insert into stu (name,age,idnum,sex)values('alice',14,123,'女');SELECT * from stu;select * from stu limit 0,2;select * from stu where name like '%ce';select * from stu where name REGEXP "a[sfdl][^ads]";select * from stu where name in ('damon','alice');select * from stu where name BETWEEN 'coco' and 'kitty'; select * from stu where name not between 'coco' and 'kitty';select name as stuname,stuid as id from stu;drop view if EXISTS young_stu;create view young_stu asselect name,age from stu where age between 10 and 20;select * from young_stu where age is not null;

後面會再記錄一章專門使用sql函數。