MySQL常用命令--create命令使用

• 切换数据库的字符集

在mysql中的配置文件中：
使用vim /etc/mysql/my.cnf
[client]
default-character-set = utf8
[mysqld]
character-set-server = utf8
这其中的mysql的版本是mysql 5.6系列的

• create 数据库

create database db_test;
create database if not exists db_test;
drop databases if exists db_test;

• create 表

create table if not exists t_user( uid varchar(50) not null, account_kind enum("stock","future"), stock_cash varchar(30), stock_sh varchar(30), stock_sz varchar(30), stock_pwd varchar(50), future_BrokerID varchar(30), future_InvestorID varchar(30), future_pwd varchar(50), unique key(stock_cash,stock_sh,stock_sz,stock_pwd), unique key(future_BrokerID,future_InvestorID,future_pwd), primary key(uid), index STOCKINFO(stock_cash,stock_sh,stock_sz,stock_pwd) )ENGINE=MyISAM DEFAULT CHARSET=utf8;

you can also use this to create index

create table t_TEST( id int not null, name varchar(10) );
create index IDX_TEST_Name on t_TEST(name);

将从一个已经存储好的表中创建一个新的表

mysql> select * from t_subscribe; +------+-------------+---------------------+
| uid | strategy_id | date | +------+-------------+---------------------+
| 1233 | 123414      | 2015-06-11 10:19:52 |
| 0    | 0           | 2015-06-11 10:19:52 |
| 1    | 1           | 2015-06-11 10:19:52 |
| 2    | 2           | 2015-06-11 10:19:52 |
| 3    | 3           | 2015-06-11 10:19:52 |
| 4    | 4           | 2015-06-11 10:19:52 |
| 5    | 5           | 2015-06-11 10:19:52 |
| 6    | 6           | 2015-06-11 10:19:52 |
| 7    | 7           | 2015-06-11 10:19:52 |
| 8    | 8           | 2015-06-11 10:19:52 |
| 9 | 9 | 2015-06-11 10:19:52 | +------+-------------+---------------------+
11 rows in set (0.00 sec)

mysql> create table test select * from t_subscribe; Query OK, 11 rows affected (0.03 sec) Records: 11 Duplicates: 0 Warnings: 0 mysql> select * from test; +------+-------------+---------------------+
| uid | strategy_id | date | +------+-------------+---------------------+
| 1233 | 123414      | 2015-06-11 10:19:52 |
| 0    | 0           | 2015-06-11 10:19:52 |
| 1    | 1           | 2015-06-11 10:19:52 |
| 2    | 2           | 2015-06-11 10:19:52 |
| 3    | 3           | 2015-06-11 10:19:52 |
| 4    | 4           | 2015-06-11 10:19:52 |
| 5    | 5           | 2015-06-11 10:19:52 |
| 6    | 6           | 2015-06-11 10:19:52 |
| 7    | 7           | 2015-06-11 10:19:52 |
| 8    | 8           | 2015-06-11 10:19:52 |
| 9 | 9 | 2015-06-11 10:19:52 | +------+-------------+---------------------+

mysql> insert into test select * from t_subscribe; Query OK, 11 rows affected (0.00 sec) Records: 11 Duplicates: 0 Warnings: 0 mysql> select * from test; +------+-------------+---------------------+
| uid | strategy_id | date | +------+-------------+---------------------+
| 1233 | 123414      | 2015-06-11 10:19:52 |
| 0    | 0           | 2015-06-11 10:19:52 |
| 1    | 1           | 2015-06-11 10:19:52 |
| 2    | 2           | 2015-06-11 10:19:52 |
| 3    | 3           | 2015-06-11 10:19:52 |
| 4    | 4           | 2015-06-11 10:19:52 |
| 5    | 5           | 2015-06-11 10:19:52 |
| 6    | 6           | 2015-06-11 10:19:52 |
| 7    | 7           | 2015-06-11 10:19:52 |
| 8    | 8           | 2015-06-11 10:19:52 |
| 9    | 9           | 2015-06-11 10:19:52 |
| 1233 | 123414      | 2015-06-11 10:19:52 |
| 0    | 0           | 2015-06-11 10:19:52 |
| 1    | 1           | 2015-06-11 10:19:52 |
| 2    | 2           | 2015-06-11 10:19:52 |
| 3    | 3           | 2015-06-11 10:19:52 |
| 4    | 4           | 2015-06-11 10:19:52 |
| 5    | 5           | 2015-06-11 10:19:52 |
| 6    | 6           | 2015-06-11 10:19:52 |
| 7    | 7           | 2015-06-11 10:19:52 |
| 8    | 8           | 2015-06-11 10:19:52 |
| 9 | 9 | 2015-06-11 10:19:52 | +------+-------------+---------------------+
22 rows in set (0.00 sec)