标签:常用sql use sql TE mysqldump ide 常用sql语句 51cto 删除表
mysql用户管理第一个*表示db_name;第二个*表示tb_name
指定其来源IP127.0.0.1(只可通过此IP登录)也可以使用通配符%,代表所有IP
identified by设置密码
[root@akuilinux01 ~]# mysql -uuser1 -p123456 -h‘127.0.0.1‘
mysql>
[root@akuilinux01 ~]# mysql -uuser2 -p123456
mysql>
通过本机登录,必须使用localhost
mysql> grant SELECT,UPDATE,INSERT on db1.* to ‘user2‘@‘192.168.21.128‘ identified by ‘123456‘;
Query OK, 0 rows affected (0.00 sec)
#创建user2用户,并授予其针对db1库SELECT,UPDATE,INSERT权限
mysql> grant all on db1.* to ‘user‘@‘%‘ identified by ‘123456‘;
Query OK, 0 rows affected (0.01 sec)
#创建user用户,并针对所有IP授予其db1库所有权限
mysql> show grants;
#查看当前用户的权限
mysql> show grants for user2@192.168.21.128;
#查看指定用户的权限
mysql> GRANT USAGE ON *.* TO ‘user2‘@‘192.168.21.128‘ IDENTIFIED BY PASSWORD ‘*6BB4837EB74329105EE44568DDA
-> ;
Query OK, 0 rows affected (0.00 sec)
mysql> GRANT SELECT, INSERT, UPDATE ON `db1`.* TO ‘user2‘@‘192.168.21.128‘;
Query OK, 0 rows affected (0.00 sec)
mysql> show grants for user2@192.168.21.128;
+-------------------------------------------------------------------------------------------------------------------+
| Grants for user2@192.168.21.128 |
+-------------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO ‘user2‘@‘192.168.21.128‘ IDENTIFIED BY PASSWORD ‘*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9‘ |
| GRANT SELECT, INSERT, UPDATE ON `db1`.* TO ‘user2‘@‘192.168.21.128‘ |
+-------------------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)
mysql> use db1;
Database changed
#选择库
mysql> select count(*) from mysql.user;
+----------+
| count(*) |
+----------+
| 12 |
+----------+
1 row in set (0.04 sec)
#查看指定库的内容的行数
mysql> select * from mysql.db\G;
#查看库的所有内容
mysql> select db,user from mysql.db;
#查看库指定内容
mysql> select * from mysql.db where host like ‘192.168.%‘\G;
#查看某些IP对应的库内容,like表示匹配
mysql> create table t1(`id` int(4),`name` char(40));
Query OK, 0 rows affected (0.39 sec)
#在db1库下创建表t1
mysql> select * from db1.t1;
Empty set (0.03 sec)
#查看表中信息:空表
mysql> insert into db1.t1 values(1,‘abc‘);
Query OK, 1 row affected (0.09 sec)
#向表中插入内容
mysql> select * from db1.t1;
+------+------+
| id | name |
+------+------+
| 1 | abc |
+------+------+
1 row in set (0.00 sec)
mysql> update db1.t1 set name=‘aaa‘ where id=1;
Query OK, 1 row affected (0.08 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> select * from db1.t1;
+------+------+
| id | name |
+------+------+
| 1 | aaa |
+------+------+
1 row in set (0.00 sec)
#更改表中指定内容
mysql> delete from db1.t1 where id=1;
Query OK, 2 rows affected (0.10 sec)
#删除表中指定内容
mysql> select * from db1.t1;
Empty set (0.00 sec)
mysql> truncate db1.t1;
Query OK, 0 rows affected (0.09 sec)
#清空一个表中内容
mysql> drop table t1;
Query OK, 0 rows affected (0.04 sec)
#删除表
mysql> drop database db1;
Query OK, 0 rows affected (0.13 sec)
#删除库
mysql> use mysql;
mysql> delete from user where User=‘user1‘ and Host=‘127.0.0.1‘;
Query OK, 1 row affected (0.06 sec)
#删除用户,在删除用户前需要先指定表
备份指定库:
[root@akuilinux01 ~]# mysqldump -uroot -p123456 mysql > /tmp/mysqlbak.sql
备份所有库:
[root@akuilinux01 ~]# mysqldump -uroot -p123456 -A > /tmp/mysql_all.sql
[root@akuilinux01 ~]# mysql -uroot -p123456 < /tmp/mysqlbak.sql
备份指定表:
[root@akuilinux01 ~]# mysql -uroot -p123456 mysql user > /tmp/user.sql
只备份表结构:
[root@akuilinux01 ~]# mysqldump -uroot -p123456 -d mysql > /tmp/mysql_tb.sql
[root@akuilinux01 ~]# mysql -uroot -p123456 mysql user < /tmp/user.sql
标签:常用sql use sql TE mysqldump ide 常用sql语句 51cto 删除表
原文地址:http://blog.51cto.com/akui2521/2131182