CREATE DATABASE booksDB;
use booksDB;
CREATE TABLE books
(
bk_id INT NOT NULL PRIMARY KEY,
bk_title VARCHAR(50) NOT NULL,
copyright YEAR NOT NULL
);
INSERT INTO books
VALUES (11078, 'Learning MySQL', 2010),
(11033, 'Study Html', 2011),
(11035, 'How to use php', 2003),
(11072, 'Teach youself javascript', 2005),
(11028, 'Learing C++', 2005),
(11069, 'MySQL professional', 2009),
(11026, 'Guide to MySQL 5.5', 2008),
(11041, 'Inside VC++', 2011);
CREATE TABLE authors
(
auth_id INT NOT NULL PRIMARY KEY,
auth_name VARCHAR(20),
auth_gender CHAR(1)
);
INSERT INTO authors
VALUES (1001, 'WriterX' ,'f'),
(1002, 'WriterA' ,'f'),
(1003, 'WriterB' ,'m'),
(1004, 'WriterC' ,'f'),
(1011, 'WriterD' ,'f'),
(1012, 'WriterE' ,'m'),
(1013, 'WriterF' ,'m'),
(1014, 'WriterG' ,'f'),
(1015, 'WriterH' ,'f');
CREATE TABLE authorbook
(
auth_id INT NOT NULL,
bk_id INT NOT NULL,
PRIMARY KEY (auth_id, bk_id),
FOREIGN KEY (auth_id) REFERENCES authors (auth_id),
FOREIGN KEY (bk_id) REFERENCES books (bk_id)
);
INSERT INTO authorbook
VALUES (1001, 11033), (1002, 11035), (1003, 11072), (1004, 11028),
(1011, 11078), (1012, 11026), (1012, 11041), (1014, 11069);
mysqldump --databases booksDB -uroot -p123 > /booksDB1.sql
mysqldump booksDB books -uroot -p123 > /booksDB2.sql
mysqldump --databases booksDB --tables books -uroot -p123 > /booksDB3.sql
4、使用mysqldump备份服务器中的所有数据库
mysqldump --all-databases -uroot -p123 > /booksDB3.sql
5、使用mysql命令还原第二题导出的book表
mysql -uroot -p123 booksDB < /booksDB2.sql
6、进入数据库使用source命令还原第二题导出的book表
source /booksDB2.sql
创建数据库,如下:
create database test1 charset utf8;
use test1
create table goods(
-> goods_id int(11) primary key auto_increment,
-> goods_name varchar(20) not null,
-> cat_id int(11) not null default(0),
-> brand_id int(11) not null default(0),
-> goods_sn char(12) not null,
-> shop_price float(6,2) not null default(0.00),
-> goods_desc text)engine=myisam charset utf8;
create table category(
-> cat_id int(11) not null primary key auto_increment,
-> cate_name varchar(20) not null,
-> parent_id int(11) not null default(0))engine=myisam charset utf8;
alter table goods drop goods_desc;
alter table goods drop goods_id;
alter table goods add click_count int(11);
alter table goods add unique index uni_index_goods_name(goods_name);
create index shop_price_index on goods(shop_price);
创建索引:
create index click_count_index on goods(click_count);
drop 删除:
drop index click_count_index on goods;
alter删除:
alter table goods drop index click_count_index;
创建如下表:
create table student(
-> sno int(11) primary key auto_increment,
-> sname varchar(20),
-> ssex enum('m','f'),
-> sage int(11),
-> sdept varchar(20));
create table course( cno int(11) primary key, cname varchar(20));
create view info as select * from student s,course c where s.sno=c.cno;