mysql入門

1.進入mysql管理
mysql -u username -p
2.創建數據庫 create database mydb;
3.創建表

create table if not exists `mytable` (
        `id` int not null auto_increment,
        `name` varchar(40) not null,
        primary key(`id`))
        engine=InnoDB;

4.插入數據

insert into mytable
(name)
values
("myname");

5.刪除數據
delete from mytable where id=1;
6.改數據
update ~~from~~ mytable set name="newname" where id=1;
7.查詢數據
select name from mytable;
8.增加索引
alter table mytable add index(name(4));
//取name前四個字符
9.FULLTEXT索引
alter table mytable add fulltext(name);
10.連表查詢

select name from mytable
join yourtable on mytable.id=yourtable.id;
 

可以用inner join ,left join ,right join,as等
11.查詢語句可以用函數 邏輯運算符
12.主鍵
primary key(id);
13.註意事項
反引號為了區分mysql只有的保留字

PHP、MySQL和JavaScript學習手冊筆記（六）