浅谈“Mysql”的基础操作语句

/*-------------------------------------------读者可以补充内容到下面--------------------------------------------------*/

//修改表名
alter table qq_user rename user;
//修改字段数据类型
alter table user modify qq_id int;
//修改字段名
alter table user change qq_id Id int;
//修改字段名和字段数据类型
alter table user change Id id bigint(6);
//增加字段(可以指定字段增加得位置)

alter table user add Name varchar(50) after id;
//删除字段
alter table user drop Name;
//修改字段得排列位置
alter table user modify Level int after Password;
//删除外键约束
alter table user drop foreign key 外键别名
//删除有外键关联的表
//俩种解决方案 1先删除子表再删除父表（不建议）2先删除子表的约束再删除父表
//**注意俩点：desc 表和 show create 表俩种方法的//表结构的查询后者更加详细可以看到外键
//*T-sql语句如何使用check约束

INSERT INTO depts(deptId,depName)
VALUES
(1, '人事部'),
(2, '研发部'),
(3, '市场部'),
(4, '培训部');

create table depts(
Id int primary key not null AUTO_INCREMENT,
deptId int not null,
depName nvarchar(50));

/*------------------------------------以下是我创建的表，以及如何插入数据------------------------------------*/

************************************************************************************
创建表
CREATE TABLE qquser(
QQID BIGINT NOT NULL AUTO_INCREMENT,
PassWord VARCHAR(100) NOT NULL,
LastLogTime DATETIME,
Online INT NOT NULL CHECK(Online=0 or Online=1 or Online=2),
Level INT NOT NULL,
PRIMARY KEY ( QQID )
);

CREATE TABLE baseinfo(
QQID BIGINT NOT NULL AUTO_INCREMENT,
NickName VARCHAR(100) NOT NULL,
SEX INT check(RelationStatus=0 or RelationStatus=1),
Age INT NOT NULL,
Province varchar(50) NOT NULL,
City varchar(50),
Address varchar(100),
Phone char(100),
PRIMARY KEY ( QQID )
);

CREATE TABLE relation(
QQID BIGINT NOT NULL AUTO_INCREMENT,
RelationQQID BIGINT NOT NULL,
RelationStatus INT NOT NULL CHECK( RelationStatus=0 or RelationStatus=1),
PRIMARY KEY ( QQID )
);
************************************************************************************
QQUser表添加数据

INSERT INTO qquser
(QQID, PassWord, LastLogTime, Online, Level)
VALUES
("54789625
", "add512#&
", "2008-02-16 17:01:35
", "2", "1");

INSERT INTO qquser
(QQID, PassWord, LastLogTime, Online, Level)
VALUES
("88662753

", "admin0219

", "2008-02-19 21:08:50

", "0", "5");

INSERT INTO qquser
(QQID, PassWord, LastLogTime, Online, Level)
VALUES
("8855678

", "guest0221
", "2008-02-21 16:28:20

", "1", "6");

****************************************************************************************
Relation表添加数据
INSERT INTO relation
(QQID, RelationQQID, RelationStatus)
VALUES
("54789625
", "88662753

", "0

");

INSERT INTO relation
(QQID, RelationQQID, RelationStatus)
VALUES
("88662753

", "8855678

", "1

");

INSERT INTO relation
(QQID, RelationQQID, RelationStatus)
VALUES
("154789625

", "8855678

", "0

");

************************************************************************************
Baselnfo表添加数据
INSERT INTO baseinfo
(QQID, NickName, SEX, Age, Province, City, Address, Phone)
VALUES
("54789625
", "蝴蝶飞飞

", "1
", "16", "北京
", "朝阳
", "亚运村
", "37547388157668
");

INSERT INTO baseinfo
(QQID, NickName, SEX, Age, Province, City, Address, Phone)
VALUES
("88662753

", "秋芙蓉

 your MySQL server version
 mysql> create table qq_user(id int primary key );
 Query OK,  rows affected (0.01 sec)

 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | qq_user          |
 +------------------+
  row in set (0.00 sec)

 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql> create table qq_user(id int primary key )
     -> create table qq_user(id/; int primary key )
 ERROR  (): You have an error
     ->
     -> ;
 ERROR  (): You have an error 

 mysql> create table qq_user(
     -> qq_id bigint primary key,
     ) not null,
     -> ;
 ERROR  (): You have an error
 mysql> create table qq_user(
     -> ;
 ERROR  (): You have an error
 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | qq_user          |
 +------------------+
  row in set (0.00 sec)

 mysql> drop table qq_user;
 Query OK,  rows affected (0.00 sec)

 mysql> show tables;
 Empty set (0.00 sec)

 mysql>
 mysql>
 mysql> create table qq_user(
     -> qq_id bigint primary key,
     ) not null,
     -> LastLoginTime datetime,
     -> Oline int,
     -> Level int);
 Query OK,  rows affected (0.00 sec)

 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | qq_user          |
 +------------------+
  row in set (0.00 sec)

 mysql> descl
     -> ;
 ERROR  (): You have an error
 mysql> desc;
 ERROR  (): You have an error
 mysql> desc qq_user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )  | NO   | PRI | NULL    |       |
 ) | NO   |     | NULL    |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql');
 Query OK,  row affected (0.00 sec)

 mysql> select *from qq_user;
 +--------+----------+---------------------+-------+-------+
 | qq_id  | Password | LastLoginTime       | Oline | Level |
 +--------+----------+---------------------+-------+-------+
   ::   |
 +--------+----------+---------------------+-------+-------+
  row in set (0.00 sec)

 mysql>
 mysql>
 mysql> truncate qq_user;
 Query OK,  rows affected (0.00 sec)

 mysql> selcet *from qq_user;
 ERROR  (): You have an error
 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | qq_user          |
 +------------------+
  row in set (0.00 sec)

 mysql> select * from qq_user;
 Empty set (0.00 sec)

 mysql> alter table qq_user rename user;
 Query OK,  rows affected (0.00 sec)

 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | user             |
 +------------------+
  row in set (0.00 sec)

 mysql> alter table user modify qq_id int;
 Query OK,  rows affected (0.00 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )            |       |
 ) | NO   |     | NULL    |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql);
 ERROR  (): You have an error
 mysql);
 Query OK,  rows affected (0.00 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )          |       |
 ) | NO   |     | NULL    |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql>
 mysql>
 mysql> alter table user change qq_id id
     -> ;
 ERROR  (): You have an error
 mysql> alter table user change qq_id id int;
 Query OK,  rows affected (0.01 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )            |       |
 ) | NO   |     | NULL    |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql) after id;
 Query OK,  rows affected (0.01 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )            |       |
 ) | YES  |     | NULL    |       |
 ) | NO   |     | NULL    |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql> alter table user drop Name;
 Query OK,  rows affected (0.00 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )            |       |
 ) | NO   |     | NULL    |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql> alter table user modify Level int after Password;
 Query OK,  rows affected (0.00 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )            |       |
 ) | NO   |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql);
 Query OK,  rows affected (0.00 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )          |       |
 ) | NO   |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql>
 mysql>
 mysql> show create user;
 ERROR  (): You have an error
 mysql> show create table user;
 +-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
 | Table | Create Table                                                                                                                                                                                                                                                                            |
 +-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
 | user  | CREATE TABLE `user` (
   `id` ) ',
   `Password` ) CHARACTER SET utf8 NOT NULL,
   `) DEFAULT NULL,
   `LastLoginTime` datetime DEFAULT NULL,
   `Oline` ) DEFAULT NULL,
   PRIMARY KEY (`id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1 |
 +-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  row in set (0.00 sec)

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )          |       |
 ) | NO   |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql) ;
 Query OK,  rows affected (0.00 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )          |       |
 ) | NO   |     | NULL    |       |
 )             |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )     | YES  |     | NULL    |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql;
 ERROR  (): You have an error
 mysql;
 ERROR  (42S22): Unknown column 'Olin' in 'user'
 mysql;
 Query OK,  rows affected (0.00 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )          |       |
 ) | NO   |     | NULL    |       |
 )             |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )            |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql) ;
 ERROR  (): You have an error
 mysql) ;
 ERROR  (): You have an error
 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )          |       |
 ) | NO   |     | NULL    |       |
 )             |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )            |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql) ';
 Query OK,  rows affected (0.01 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc;
 ERROR  (): You have an error
 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )          |       |
 )    |       |
 )             |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )            |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql,);
 Query OK,  rows affected (0.03 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )          |       |
 )    |       |
 )             |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )            |       |
 )     | YES  |     | NULL    |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql> alter table user modify age int after password;
 Query OK,  rows affected (0.01 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )          |       |
 )    |       |
 )     | YES  |     | NULL    |       |
 )             |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )            |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql) not null default 'guo' after id;
 Query OK,  rows affected (0.01 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )          |       |
 ) | NO   |     | guo     |       |
 )    |       |
 )     | YES  |     | NULL    |       |
 )             |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )            |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql> CREATE TABLE baseinfo(
     ->  QQID BIGINT NOT NULL AUTO_INCREMENT,
     ) NOT NULL,
      ),
     ->  Age INT NOT NULL,
     ) NOT NULL,
     ),
     ),
     ),
     ->   PRIMARY KEY ( QQID )
     ->  );
 Query OK,  rows affected (0.00 sec)

 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | baseinfo         |
 | user             |
 +------------------+
  rows in set (0.00 sec)

 mysql> desc baseinfo;
 +----------+--------------+------+-----+---------+----------------+
 | Field    | Type         | Null | Key | Default | Extra          |
 +----------+--------------+------+-----+---------+----------------+
 )   | NO   | PRI | NULL    | auto_increment |
 ) | NO   |     | NULL    |                |
 )      | YES  |     | NULL    |                |
 )      | NO   |     | NULL    |                |
 )  | NO   |     | NULL    |                |
 )  | YES  |     | NULL    |                |
 ) | YES  |     | NULL    |                |
 )    | YES  |     | NULL    |                |
 +----------+--------------+------+-----+---------+----------------+
  rows in set (0.00 sec)

 mysql> CREATE TABLE qquser(
     ->  QQID BIGINT NOT NULL AUTO_INCREMENT,
     ) NOT NULL,
     ->  LastLogTime  DATETIME,
       ),
     ->  Level INT NOT NULL,
     ->  PRIMARY KEY ( QQID )
     ->  );
 Query OK,  rows affected (0.00 sec)

 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | baseinfo         |
 | qquser           |
 | user             |
 +------------------+
  rows in set (0.00 sec)

 mysql> desc user;
 +---------------+-------------+------+-----+---------+-------+
 | Field         | Type        | Null | Key | Default | Extra |
 +---------------+-------------+------+-----+---------+-------+
 )          |       |
 ) | NO   |     | guo     |       |
 )    |       |
 )     | YES  |     | NULL    |       |
 )             |       |
 | LastLoginTime | datetime    | YES  |     | NULL    |       |
 )            |       |
 +---------------+-------------+------+-----+---------+-------+
  rows in set (0.00 sec)

 mysql> desc qquser;
 +-------------+--------------+------+-----+---------+----------------+
 | Field       | Type         | Null | Key | Default | Extra          |
 +-------------+--------------+------+-----+---------+----------------+
 )   | NO   | PRI | NULL    | auto_increment |
 ) | NO   |     | NULL    |                |
 | LastLogTime | datetime     | YES  |     | NULL    |                |
 )      | NO   |     | NULL    |                |
 )      | NO   |     | NULL    |                |
 +-------------+--------------+------+-----+---------+----------------+
  rows in set (0.00 sec)

 mysql> CREATE TABLE relation(
     ->  QQID BIGINT NOT NULL AUTO_INCREMENT,
     ->  RelationQQID BIGINT NOT NULL,
      ),
     ->  PRIMARY KEY ( QQID )
     ->  );
 Query OK,  rows affected (0.01 sec)

 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | baseinfo         |
 | qquser           |
 | relation         |
 | user             |
 +------------------+
  rows in set (0.00 sec)

 mysql> desc relation;
 +----------------+------------+------+-----+---------+----------------+
 | Field          | Type       | Null | Key | Default | Extra          |
 +----------------+------------+------+-----+---------+----------------+
 ) | NO   | PRI | NULL    | auto_increment |
 ) | NO   |     | NULL    |                |
 )    | NO   |     | NULL    |                |
 +----------------+------------+------+-----+---------+----------------+
  rows in set (0.00 sec)

 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql> INSERT INTO qquser
     -> (QQID, PassWord, LastLogTime, Online, Level)
     -> VALUES 

     "> ", "add512#&
     " ::
     "", "");
 Query OK,  row affected (0.00 sec)

 mysql> select *from qquser;
 +----------+-----------+---------------------+--------+-------+
 | QQID     | PassWord  | LastLogTime         | Online | Level |
 +----------+-----------+---------------------+--------+-------+
  | add512#&
   ::   |
 +----------+-----------+---------------------+--------+-------+
  row in set (0.00 sec)

 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | baseinfo         |
 | qquser           |
 | relation         |
 | user             |
 +------------------+
  rows in set (0.00 sec)

 mysql> ceate table depts;
 ERROR  (): You have an error
 mysql> create table depts;
 ERROR  (): A  column
 mysql> create table depts(
     -> Id int primary key,
     -> deptId int not null,
     ),);
 ERROR  (): You have an error
 mysql));
 Query OK,  rows affected (0.00 sec)

 mysql>
 mysql>
 mysql>
 mysql>
 mysql> INSERT INTO depts
     -> VALUES
     ', '人事部', ' '),
     ', '研发部', ' '),
     ', '市场部', ' '),
     ', '培训部', ' ');
 Query OK,  rows affected,  warnings (0.00 sec)
 Records:   Duplicates:   Warnings: 

 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | baseinfo         |
 | depts            |
 | qquser           |
 | relation         |
 | user             |
 +------------------+
  rows in set (0.00 sec)

 mysql> select * from depts;
 +----+--------+---------+
 | Id | deptId | depName |
 +----+--------+---------+
   |         |
   |         |
   |         |
   |         |
 +----+--------+---------+
  rows in set (0.00 sec)

 mysql> delect from depts;
 ERROR  (): You have an error
 mysql> delete *from depts;
 ERROR  (): You have an error
 mysql> delete from depts;
 Query OK,  rows affected (0.00 sec)

 mysql> select *from
 Display  possibilities? (y or n)
 mysql> select *from depts;
 Empty set (0.00 sec)

 mysql> INSERT INTO depts
     -> VALUES
     ', '人事部', ' '),
     ', '研发部', ' '),
     ', '市场部', ' '),
     ', '研发部', ' '), ;
 ERROR  (): You have an error
 mysql> INSERT INTO depts
     -> VALUES
     ', '人事部'),
     ', '研发部'),
     ', '市场部'),
     ', '培训部');
 ERROR  (21S01): Column count doesn't match value count at row 1
 mysql> select *from depts;
 Empty set (0.00 sec)

 mysql> INSERT INTO depts(deptId,depName)
     -> VALUES
 ', '人事部'),
 ', '研发部'),
 ', '市场部'),
 ', '培训部');
 ' for key 'PRIMARY'
 mysql> desc depts;
 +---------+-------------+------+-----+---------+-------+
 | Field   | Type        | Null | Key | Default | Extra |
 +---------+-------------+------+-----+---------+-------+
 | Id      | int(11)     | NO   | PRI | NULL    |       |
 | deptId  | int(11)     | NO   |     | NULL    |       |
 | depName | varchar(50) | YES  |     | NULL    |       |
 +---------+-------------+------+-----+---------+-------+
 3 rows in set (0.00 sec)

 mysql> INSERT INTO depts(deptId,depName)
     -> VALUES
     -> (1, '人事部'),
     -> (2, '研发部'),
     -> (3, '市场部'),
     -> (4, '培训部');
 ' for key 'PRIMARY'
 mysql> alter table depts modify Id int not null atuo_increment;
 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'atuo_increment' at line 1
 mysql> alter table depts modify Id int atuo_increment;
 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'atuo_increment' at line 1
 mysql>
 mysql>
 mysql>
 mysql> drop table depts;
 Query OK, 0 rows affected (0.00 sec)

 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | baseinfo         |
 | qquser           |
 | relation         |
 | user             |
 +------------------+
 4 rows in set (0.00 sec)

 mysql> create table depts(
     ->     -> Id int primary key AUTO_INCREMENT,
     ->     -> deptId int not null,
     ->     -> depName nvarchar(50),);
 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-> Id int primary key AUTO_INCREMENT,
     -> deptId int not null,
     -> depName' at line 2
 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | baseinfo         |
 | qquser           |
 | relation         |
 | user             |
 +------------------+
 4 rows in set (0.00 sec)

 mysql> create table depts(
     ->     -> Id int primary key not null AUTO_INCREMENT,
     ->     -> deptId int not null,
     ->     -> depName nvarchar(50),);
 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-> Id int primary key not null AUTO_INCREMENT,
     -> deptId int not null,
     -' at line 2
 mysql>  create table depts(
     ->     Id int primary key not null AUTO_INCREMENT,
     ->     deptId int not null,
     ->     depName nvarchar(50),);
 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 4
 mysql> create table depts(
     ->     Id int primary key not null AUTO_INCREMENT,
     ->     deptId int not null,
     ->     depName nvarchar(50));
 Query OK, 0 rows affected (0.00 sec)

 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | baseinfo         |
 | depts            |
 | qquser           |
 | relation         |
 | user             |
 +------------------+
 5 rows in set (0.00 sec)

 mysql> desc depts;
 +---------+-------------+------+-----+---------+----------------+
 | Field   | Type        | Null | Key | Default | Extra          |
 +---------+-------------+------+-----+---------+----------------+
 | Id      | int(11)     | NO   | PRI | NULL    | auto_increment |
 | deptId  | int(11)     | NO   |     | NULL    |                |
 | depName | varchar(50) | YES  |     | NULL    |                |
 +---------+-------------+------+-----+---------+----------------+
 3 rows in set (0.00 sec)

 mysql> INSERT INTO depts(deptId,depName)
     -> VALUES
     -> (1, '人事部'),
     -> (2, '研发部'),
     -> (3, '市场部'),
     -> (4, '培训部');
 Query OK, 4 rows affected (0.00 sec)
 Records: 4  Duplicates: 0  Warnings: 0

 mysql> select *from depts;
 +----+--------+-----------+
 | Id | deptId | depName   |
 +----+--------+-----------+
 |  1 |      1 | 人事部 |
 |  2 |      2 | 研发部 |
 |  3 |      3 | 市场部 |
 |  4 |      4 | 培训部 |
 +----+--------+-----------+
 4 rows in set (0.00 sec)

 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql> create table employees(
     -> Id int primary key auto_increment,
     -> Name nvarchar(22) not null,
     -> flag varchar(20),
     -> JoinTime datetime,
     -> Money decimal,
     -> adress nvarchar(20),
     -> mark1 nvarchar(20),
     -> mark2 nvarchar(20)
     -> );
 Query OK, 0 rows affected (0.01 sec)

 mysql>
 mysql>
 mysql> show tables;
 +------------------+
 | Tables_in_systop |
 +------------------+
 | baseinfo         |
 | depts            |
 | employees        |
 | qquser           |
 | relation         |
 | user             |
 +------------------+
 6 rows in set (0.00 sec)

 mysql> INSERT INTO employees
     -> VALUES
  ::', '3500.00', '北京', ' ', ' '),
  ::', '5000.00', '上海', ' ', ' '),
  ::', '7000.00', '福建', ' ', ' '),
  ::', '2800.00', '广东', ' ', ' '),
  ::', '8000.00', '山东', ' ', ' '),
  ::', '2000.00', '河北', ' ', ' ');

 mysql> select *from employees;
 Empty set (0.00 sec)

 mysql> desc employees;
 +----------+---------------+------+-----+---------+----------------+
 | Field    | Type          | Null | Key | Default | Extra          |
 +----------+---------------+------+-----+---------+----------------+
 )       | NO   | PRI | NULL    | auto_increment |
 )   | NO   |     | NULL    |                |
 )   | YES  |     | NULL    |                |
 | JoinTime | datetime      | YES  |     | NULL    |                |
 ,) | YES  |     | NULL    |                |
 )   | YES  |     | NULL    |                |
 )   | YES  |     | NULL    |                |
 )   | YES  |     | NULL    |                |
 +----------+---------------+------+-----+---------+----------------+
  rows in set (0.00 sec)

 mysql> alter table employees add deptId int after flag;
 Query OK,  rows affected (0.01 sec)
 Records:   Duplicates:   Warnings: 

 mysql> desc employees;
 +----------+---------------+------+-----+---------+----------------+
 | Field    | Type          | Null | Key | Default | Extra          |
 +----------+---------------+------+-----+---------+----------------+
 )       | NO   | PRI | NULL    | auto_increment |
 )   | NO   |     | NULL    |                |
 )   | YES  |     | NULL    |                |
 )       | YES  |     | NULL    |                |
 | JoinTime | datetime      | YES  |     | NULL    |                |
 ,) | YES  |     | NULL    |                |
 )   | YES  |     | NULL    |                |
 )   | YES  |     | NULL    |                |
 )   | YES  |     | NULL    |                |
 +----------+---------------+------+-----+---------+----------------+
  rows in set (0.00 sec)

 mysql> INSERT INTO employees
     -> VALUES
     ', '2008-02-02 12:12:12', '3500.00', '北京', ' ', ' '),
     ', '2007-02-20 13:13:13', '5000.00', '上海', ' ', ' '),
     ', '2012-12-30 14:14:14', '7000.00', '福建', ' ', ' '),
     ', '2008-06-06 15:15:15', '2800.00', '广东', ' ', ' '),
     ', '2005-08-21 11:11:11', '8000.00', '山东', ' ', ' '),
     ', '2008-04-16 10:10:10', '2000.00', '河北', ' ', ' ');
 Query OK,  rows affected (0.00 sec)
 Records:   Duplicates:   Warnings: 

 mysql> select *from employees;
 +----+--------+------+--------+---------------------+-------+--------+-------+-------+
 | Id | Name   | flag | deptId | JoinTime            | Money | adress | mark1 | mark2 |
 +----+--------+------+--------+---------------------+-------+--------+-------+-------+
    ::  | 北京 |       |       |
    ::  | 上海 |       |       |
    ::  | 福建 |       |       |
    ::  | 广东 |       |       |
    ::  | 山东 |       |       |
    ::  | 河北 |       |       |
 +----+--------+------+--------+---------------------+-------+--------+-------+-------+
  rows in set (0.00 sec)

 mysql> INSERT INTO baseinfo
     -> (QQID, NickName, SEX, Age, Province, City, Address, Phone)
     -> VALUES

     "> ", "蝴蝶飞飞
     ">
     "
     "", "北京
     "> ", "朝阳
     "> ", "亚运村
     "
     "> ");
 Query OK,  row affected (0.00 sec)

 mysql>
 mysql> INSERT INTO baseinfo
     -> (QQID, NickName, SEX, Age, Province, City, Address, Phone)
     -> VALUES

     ">
     "> ", "秋芙蓉
     ">
     ">
     "
     "", "河南
     "> ", "南阳
     "> ", "方城博望
     ">
     "
     ">
     "> ");
 Query OK,  row affected (0.00 sec)

 mysql>
 mysql> INSERT INTO baseinfo
     -> (QQID, NickName, SEX, Age, Province, City, Address, Phone)
     -> VALUES

     ">
     "> ", "双眼皮の潴
     ">
     ">
     "
     "", "北京
     "> ", "海淀
     "> ", "双榆树东里
     ">
     "
     ">
     "> ");
 Query OK,  row affected (0.00 sec)

 mysql> select *from baseinfo;
 +----------+--------------------+------+-----+----------+---------+-------------------+------------------+
 | QQID     | NickName           | SEX  | Age | Province | City    | Address           | Phone            |
 +----------+--------------------+------+-----+----------+---------+-------------------+------------------+
  | 蝴蝶飞飞

        | 北京
   | 朝阳
  | 亚运村

   |
  | 秋芙蓉

          | 河南
   | 南阳
  | 方城博望

  |
  | 双眼皮の潴

    | 北京
   | 海淀
  | 双榆树东里

  |
 +----------+--------------------+------+-----+----------+---------+-------------------+------------------+
  rows in set (0.00 sec)

 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql>
 mysql> Relation表添加数据
     -> INSERT INTO relation
     -> (QQID, RelationQQID,  RelationStatus)
     -> VALUES

     "
     ">
     "
     ">
     ">
     "> ");
 ERROR  (): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Relation表添加数据
 INSERT INTO relation 

 mysql>
 mysql> INSERT INTO relation
     -> (QQID, RelationQQID,  RelationStatus)
     -> VALUES

     ">
     "
     ">
     ">
     "
     ">
     ">
     "> ");
 Query OK,  row affected (0.00 sec)

 mysql>
 mysql> INSERT INTO relation
     -> (QQID, RelationQQID,  RelationStatus)
     -> VALUES

     ">
     "
     ">
     ">

", "0
", "20", "河南
", "南阳
", "方城博望

", "88715783657725

");

INSERT INTO baseinfo
(QQID, NickName, SEX, Age, Province, City, Address, Phone)
VALUES
("8855678

", "双眼皮の潴

", "1
", "38", "北京
", "海淀
", "双榆树东里

", "65794968876143

");

INSERT INTO depts
VALUES
('1', '人事部', ' '),
('2', '研发部', ' '),
('3', '市场部', ' '),
('4', '培训部', ' ');

INSERT INTO employees
VALUES
('01', '张三', 'M', '2', '2008-02-02 12:12:12', '3500.00', '北京', ' ', ' '),
('02', '李四', 'F', '4', '2007-02-20 13:13:13', '5000.00', '上海', ' ', ' '),
('03', '王五', 'M', '1', '2012-12-30 14:14:14', '7000.00', '福建', ' ', ' '),
('04', '赵六', 'F', '2', '2008-06-06 15:15:15', '2800.00', '广东', ' ', ' '),
('05', '钱七', 'M', '4', '2005-08-21 11:11:11', '8000.00', '山东', ' ', ' '),
('06', '孙八', 'F', '2', '2008-04-16 10:10:10', '2000.00', '河北', ' ', ' ');

写博客刚开始起步，积累点经验！！！

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