mysql 库基础命令汇总

1 登录Mysql数据库

[root@db02--52 ~]# mysql -uroot -p

Enter passWord: 

Welcome to the Mysql monitor.  Commands end with ; or \g.

Your MySQL connection id is 9

Server version: 5.6.34-log Source distribution

Copyright (c) 2000, 2016, oracle and/or its affiliates. All rights reserved.

Oracle is a reGIStered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> 

2 查看当前登录的用户：

mysql> select user();

+----------------+

| user()         |

+----------------+

| root@localhost |

+----------------+

1 row in set (0.20 sec)

mysql> 

3 创建数据库haha，并查看已建库完整语句

mysql> create database haha; 创建数据库haha

Query OK, 1 row affected (0.00 sec)

mysql> show create database haha;查看刚健的数据库

+----------+---------------------------------------------------------------+

| Database | Create Database                                               |

+----------+---------------------------------------------------------------+

| haha     | CREATE DATABASE `haha` |

+----------+---------------------------------------------------------------+

1 row in set (0.00 sec)

mysql> show databases; 查看所有的数据库

+--------------------+

| Database           |

+--------------------+

| infORMation_schema |

| haha               |

| mysql              |

| oldboy             |

| oldgril            |

| performance_schema |

| xinpan             |

| xu                 |

+--------------------+

8 rows in set (0.00 sec)

mysql> 

4 创建用户hehe  使之可以管理数据库haha

mysql> create user hehe@'localhost' identified by 'oldboy123'

    -> ;创建本地用户hehe 授权数据库密码

Query OK, 0 rows affected (0.06 sec)

mysql> grant all on haha.* to hehe@'localhost';haha为数据库，hehe为用户

Query OK, 0 rows affected (0.00 sec)

5 查看创建的用户hehe拥有哪些权限

mysql> show grants for hehe@'localhost';查看创建的用户hehe拥有哪些权限

+-------------------------------------------------------------------------------------------------------------+

| Grants for hehe@localhost                                                                                   |

+-------------------------------------------------------------------------------------------------------------+

| GRANT USAGE ON *.* TO 'hehe'@'localhost' IDENTIFIED BY PASSWORD '*FE28814B4A8B3309DAC6ED7D3237ADED6DA1E515' |

| GRANT ALL PRIVILEGES ON `oldboy`.* TO 'hehe'@'localhost'                                                    |

| GRANT ALL PRIVILEGES ON `hehe`.* TO 'hehe'@'localhost'                                                      |

| GRANT ALL PRIVILEGES ON `haha`.* TO 'hehe'@'localhost'                                                      |

+-------------------------------------------------------------------------------------------------------------+

4 rows in set (0.03 sec)

6 查看当前数据库里有哪些用户。

mysql> 

mysql> select user,host from mysql.user;

+-----------+------------+

| user      | host       |

+-----------+------------+

| keke      | %          |

| oldboy    | %          |

| xinjia    | %          |

| mha       | 10.0.0.%   |

| rep       | 10.0.0.%   |

| root      | 127.0.0.1  |

| bbs       | 172.16.1.% |

| wordpress | 172.16.1.% |

| root      | db02--52   |

| haha      | localhost  |

| hehe      | localhost  |

| oldboy    | localhost  |

| root      | localhost  |

| system    | localhost  |

+-----------+------------+

14 rows in set (0.00 sec)

mysql> 

6 进入oldboy数据库

mysql> use oldboy

Database changed

mysql> 

7 查看当前所在的数据库

mysql> select database();

+------------+

| database() |

+------------+

| oldboy     |

+------------+

1 row in set (0.00 sec)

mysql> 

8 创建一张表xiaoke 字段id和name varchar（16）

mysql> create table xiaoke ( id int(4) not null, name varchar (16) not null);

Query OK, 0 rows affected (0.63 sec)

mysql> 

9查看建表结构以及表结构的sql语句

mysql> desc xiaoke 查看表的结构

    -> ;

+-------+-------------+------+-----+---------+-------+

| Field | Type        | Null | Key | Default | Extra |

+-------+-------------+------+-----+---------+-------+

| id    | int(4)      | NO   |     | NULL    |       |

| name  | varchar(16) | NO   |     | NULL    |       |

+-------+-------------+------+-----+---------+-------+

2 rows in set (0.03 sec)

查看表结构的sql语句

mysql> show full columns from xiaoke; 查看表结构的sql语句

+-------+-------------+-----------------+------+-----+---------+-------+---------------------------------+---------+

| Field | Type        | Collation       | Null | Key | Default | Extra | Privileges                      | Comment |

+-------+-------------+-----------------+------+-----+---------+-------+---------------------------------+---------+

| id    | int(4)      | NULL            | NO   |     | NULL    |       | select,insert,update,references |         |

| name  | varchar(16) | utf8_general_ci | NO   |     | NULL    |       | select,insert,update,references |         |

+-------+-------------+-----------------+------+-----+---------+-------+---------------------------------+---------+

2 rows in set (0.00 sec)

mysql> 

10 插入一条数据“1，aini”

mysql> insert into test(id,name) values(1,'aini');

Query OK, 1 row affected (0.02 sec)

mysql> select * from test;

+----+------+--------+

| id | age  | name   |

+----+------+--------+

|  1 | NULL | oldboy |

|  1 | NULL | oldboy |

|  1 | NULL | aini   |

+----+------+--------+

3 rows in set (0.02 sec)

mysql> 

11 再批量插入2行数据“2，xiaoxu”“3，xiaoxin”

mysql> insert into test(id,name) values(2,'xaioke'),(3,'xiaoxin');

Query OK, 2 rows affected (0.00 sec)

Records: 2  Duplicates: 0  Warnings: 0

mysql> select * from test;

+----+------+---------+

| id | age  | name    |

+----+------+---------+

|  1 | NULL | oldboy  |

|  1 | NULL | oldboy  |

|  1 | NULL | aini    |

|  2 | NULL | xaioke  |

|  3 | NULL | xiaoxin |

+----+------+---------+

5 rows in set (0.00 sec)

12 查询名字为oldboy的记录

mysql> select * from test where name='oldboy';

+----+------+--------+

| id | age  | name   |

+----+------+--------+

|  1 | NULL | oldboy |

|  1 | NULL | oldboy |

+----+------+--------+

2 rows in set (0.00 sec)

mysql> 

13 把数据库id等于1的名字oldboy更改为oldgril

mysql> select * from test where name='oldboy';

+----+------+--------+

| id | age  | name   |

+----+------+--------+

|  1 | NULL | oldboy |

|  1 | NULL | oldboy |

+----+------+--------+

2 rows in set (0.00 sec)

mysql> updata test set name='oldgirl' where id='1';

mysql> select * from test;

+----+------+---------+

| id | age  | name    |

+----+------+---------+

|  1 | NULL | oldgirl |

|  1 | NULL | oldgirl |

|  1 | NULL | oldgirl |

|  2 | NULL | xaioke  |

|  3 | NULL | xiaoxin |

+----+------+---------+

5 rows in set (0.00 sec)

mysql> 

未完待续。。。。。