2. MySQL database operation

1. MySQL database

　　View an existing database　

1 mysql> show databases;
2 +--------------------+
3 | Database           |
4 +--------------------+
5 | information_schema |
6 | mysql              |
7 | performance_schema |
8 +--------------------+
9 3 rows in set (0.00 sec)

　　Create a database, then view the database

 1 mysql> create database mysqltest;
 2 mysql> show databases;
 3 +--------------------+
 4 | Database           |
 5 +--------------------+
 6 | information_schema |
 7 | mysql              |
 8 | mysqltest          |
 9 | performance_schema |
10 +--------------------+
11 4 rows in set (0.00 sec)
12 
13 mysql> 

　　Switch to the current database we just created　

mysql> use mysqltest;
Database changed

　　Modify the database

　　Modify the default character set and collation of the database you just created

　　

mysql> alter database mysqltest 
            default character set gb2312     
            default collate gb2312_chinese_ci; 
            Query OK, 1 row affected (0.00 sec)
mysql>                     

　　delete database

　　

mysql> drop database if exists mysqltest;
Query OK, 0 rows affected (0.00 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
+--------------------+
3 rows in set (0.01 sec)

mysql>