MySQL数据库的自动备份与数据库被破坏后的恢复（2）

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the buffer.

mysql> create database test;　 ← 建立一个测试用的数据库test 
Query OK, 1 row affected (0.00 sec)

mysql> use test　 ← 连接到这个数据库 
Database changed

mysql> create table test(num int, name varchar(50));　 ← 在数据库中建立一个表 
Query OK, 0 rows affected (0.07 sec)

mysql> insert into test values(1,‘Hello,CentOS‘);　 ← 插入一个值到这个表（这里以“Hello,CentOS”为例） 
Query OK, 1 row affected (0.02 sec)

mysql> select * from test;　 ← 查看数据库中的内容 
+------+-----------------+ 
| num | name | 
+------+-----------------+ 
|1　 | Hello,Centos |　 ← 确认刚刚插入到表中的值的存在 
+------+------------------+ 
1 row in set (0.01 sec)

mysql> exit　 ← 退出MySQL服务器 
Bye

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the buffer.

mysql> use test　 ← 连接到测试用的test数据库 
Reading table information for completion of table and column names 
You can turn off this feature to get a quicker startup with -A

Database changed 
mysql> drop table test;　 ← 删除数据中的表 
Query OK, 0 rows affected (0.04 sec)

mysql> drop database test;　 ← 删除测试用数据库test 
Query OK, 0 rows affected (0.01 sec)

mysql> show databases; 
+---------------+ 
| Database | 
+---------------+ 
| mysql |　 ← 确认测试用的test数据库已不存在、已被删除 
+---------------+ 
1 row in set (0.01 sec)

mysql> exit　 ← 退出MySQL服务器 
Bye

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the buffer.

mysql> show databases;　 ← 查看当前存在的数据库 
+-------------+ 
| Database | 
+-------------+ 
| mysql | 
| test　 |　 ← 确认刚刚被删除的test数据库已经成功被恢复回来！ 
+------------+ 
2 rows in set (0.00 sec)

mysql> use test　 ← 连接到test数据库 
Reading table information for completion of table and column names 
You can turn off this feature to get a quicker startup with -A

Database changed 
mysql> show tables;　 ← 查看test数据库中存在的表 
+-------------------+ 
| Tables_in_test | 
+-------------------+ 
| test 　| 
+-------------------+ 
1 row in set (0.00 sec)

mysql> select * from test;　 ← 查看数据库中的内容 
+------+---------------------+ 
| num | name　 | 
+------+---------------------+ 
| 1 | Hello,CentOS |　 ← 确认数据表中的内容与删除前定义的“Hello,CentOS”一样！ 
+------+---------------------+ 
1 row in set (0.01 sec)

mysql> exit　 ← 退出MySQL服务器 
Bye