mysql绿色版怎么下载 mysql 绿色版( 二 )


+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| test |
+--------------------+
3 rows in set (0.02 sec)
可以看到MySQL服务器中有三个数据库 。
6)、使用数据库
mysql use test
Database changed
7)、查看数据库中的表
mysql show tables;
Empty set (0.00 sec)
8)、创建表ttt
mysql create table ttt(a int,b varchar(20));
Query OK, 0 rows affected (0.00 sec)
9)、插入三条数据
mysql insert into ttt values(1,'aaa');
Query OK, 1 row affected (0.02 sec)
mysql insert into ttt values(2,'bbb');
Query OK, 1 row affected (0.00 sec)
mysql insert into ttt values(3,'ccc');
Query OK, 1 row affected (0.00 sec)
10)、查询数据
mysql select * from ttt;
+------+------+
| a | b |
+------+------+
| 1 | aaa |
| 2 | bbb |
| 3 | ccc |
+------+------+
3 rows in set (0.00 sec)
11)、删除数据
mysql delete from ttt where a=3;
Query OK, 1 row affected (0.01 sec)
删除后查询操作结果:
mysql select * from ttt;
+------+------+
| a | b |
+------+------+
| 1 | aaa |
| 2 | bbb |
+------+------+
2 rows in set (0.00 sec)
12)、更新数据
mysql update ttt set b = 'xxx' where a =2;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
查看更新结果:
mysql select * from ttt;
+------+------+
| a | b |
+------+------+
| 1 | aaa |
| 2 | xxx |
+------+------+
2 rows in set (0.00 sec)
13)、删除表
mysql drop table ttt;
Query OK, 0 rows affected (0.00 sec)
查看数据库中剩余的表:
mysql show tables;
Empty set (0.00 sec)
三、更改MySQL数据库root用户的密码
1、使用mysql数据库
mysql use mysql
Database changed
2、查看mysql数据库中所有的表
mysqlshow tables;
+---------------------------+
| Tables_in_mysql |
+---------------------------+
| columns_priv |
| db |
| func |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| host |
| proc |
| procs_priv |
| tables_priv |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| user |
+---------------------------+
17 rows in set (0.00 sec)
3、删除mysql数据库中用户表的所有数据
mysql delete from user;
Query OK, 3 rows affected (0.00 sec)
4、创建一个root用户,密码为"xiaohui" 。
mysqlgrant all on *.* to root@'%' identified by 'xiaohui' with grant option;
Query OK, 0 rows affected (0.02 sec)
5、查看user表中的用户
mysql select User from user;
+------+
| User |
+------+
| root |
+------+
1 row in set (0.00 sec)
6、重启MySQL:更改了MySQL用户后,需要重启MySQL服务器才可以生效 。
net stop mysql
MySQL 服务正在停止..
MySQL 服务已成功停止 。
net start mysql
MySQL 服务正在启动 .
MySQL 服务已经启动成功 。
7、重新登陆MySQL服务器
mysql -uroot -pxiaohui
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.1.32-community MySQL Community Edition (GPL)
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql
如果修改密码后net startmysql出现不能启动mysql的1067错误,则可以使用以下办法解决:
使用cmd命令:D:\Appserv\mysql\bin\mysqladmin -uroot -p shutdown,然后输入密码,再net start mysql 就没有这个错误提示了!

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