MySQL经常使用命令--create命令使用-优快云博客

本文介绍如何在MySQL 5.6中配置字符集，创建数据库及表，并通过示例展示了如何从现有表复制数据创建新表。

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切换数据库的字符集

在mysql中的配置文件里：
使用vim /etc/mysql/my.cnf
[client]
default-character-set = utf8
[mysqld]
character-set-server = utf8
这当中的mysql的版本号是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)

转载于:https://www.cnblogs.com/gccbuaa/p/7246712.html