[Mysql] Learning_Notes for MYSQL

create database mydata;

use mydata;

create table dept
(
deptno int primary key,
dname varchar(14),
loc varchar(13)
);

create table emp
(
empno int primary key,
ename varchar(10),
job varchar(10),
mgr int,
hiredate datetime,
sal double,
comm double,
deptno int,
foreign key (deptno) references dept(deptno)
);
?
. c:\mysql_script\mydata.sql
desc dept
insert into dept values(10, 'A', 'a');
insert into dept values(20, 'B', 'b');
insert into dept values(30, 'C', 'c');
insert into dept values(40, 'D', 'd');
insert into dept values(50, 'E', 'e');
commit;
select * from dept order by deptno desc limit 3, 2;   -- 降序第三行之后，分页
create table article
(
id int primary key auto_increment,  -- 自动递增
title varchar(255)
);
select now();
select date_format(now(), '%Y-%m-%d %H:%i:%s');
insert into emp values(9999, 'test', 'clerk', 7369, '1981-12-23 12:23:23', 8000, 80, 10);

-------------------bbs.sql----------------------------------------------------------------------
create database bbs;

use bbs;

create table article 
(
id int primary key auto_increment,
pid int,
rootid int,
title varchar(255),
cont text,
pdate datetime,
isleaf int 
);

insert into article values (null, 0, 1, '蚂蚁大战大象', '蚂蚁大战大象', now(), 1);
insert into article values (null, 1, 1, '大象被打趴下了', '大象被打趴下了',now(), 1);
insert into article values (null, 2, 1, '蚂蚁也不好过','蚂蚁也不好过', now(), 0);
insert into article values (null, 2, 1, '瞎说', '瞎说', now(), 1);
insert into article values (null, 4, 1, '没有瞎说', '没有瞎说', now(), 0);
insert into article values (null, 1, 1, '怎么可能', '怎么可能', now(), 1);
insert into article values (null, 6, 1, '怎么没有可能', '怎么没有可能', now(), 0);
insert into article values (null, 6, 1, '可能性是很大的', '可能性是很大的', now(), 0);
insert into article values (null, 2, 1, '大象进医院了', '大象进医院了', now(), 1);
insert into article values (null, 9, 1, '护士是蚂蚁', '护士是蚂蚁', now(), 0);
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