同样也是用于记录以便日后联系用！里面基本包含了一般sql的高级用法！ 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=
同样也是用于记录以便日后联系用！里面基本包含了一般sql的高级用法！
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;
后面会再记录一章专门使用sql函数。