MySQL常用命令--create命令使用

来源：互联网发布：东北农业大学知乎编辑：程序博客网时间：2024/05/20 08:45

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: 0mysql> 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: 0mysql> 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)

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