1.查看數據庫
mysql> show databases;
2.查看mysql數據庫中的表
mysql> use mysql；
mysql> show tables;
3.查看user表屬性信息
show table status from mysql where name='user'\G;
4.練習
a.創建庫bookshop
mysql> create database bookshop;
b.在bookshop庫下創建表reserver
mysql> create table reserve (id int primary key,bookname varchar(50),writer varchar(50),bookdate date,price float,amount int);
*primary key爲主鍵，主鍵表明數據唯一性，後期做索引用
*或者指定數據庫創建表
mysql> create table bookshop.test(id int primary key,name varchar(30),age int,sex varchar(20));
c.刪除表
mysql> drop table test;
d.查看錶結構
mysql> desc reserve
e.向reserve表插入數據
mysql> insert into reserve set id=1,bookname='live with linux',writer='tute',bookdate=2007-1-25,price=75.00,amount=50;
*第二種插入方式：
insert into reserve values(2,'Linux inside','Kevin','2008-2-15',83.00,50),
-> (3,'L.A.M.P','Tom','2008-2-5',82.50,50);
f.刪除reserve表中第一行信息
mysql> delete from reserve where id=1;
*and或or的使用
mysql> delete from reserve where id=1 and writer='Kevin';(同時滿足id=1和writer='Kevin')
mysql> delete from reserve where id=1 or writer='Kevin';(滿足id=1或者writer='Kevin')
g.修改書名是L.A.M.P的庫存爲48：
mysql> update reserve set amount=48 where bookname='L.A.M.P';
****語法***
