134 lines
3.9 KiB
Markdown
134 lines
3.9 KiB
Markdown
## Install MySQL
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- 下載MySQL： https://downloads.mysql.com/archives/installer/
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- 安裝
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- 安裝之後，執行MSQL Installer - Community
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- ![[Pasted image 20210423152623.png]]
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- 選擇MySQL Server的Reconfigure
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- ![[Pasted image 20210423152747.png]]
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- 依序設定port、帳號密碼。
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## Install MariaDB
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1. `sudo apt install mariadb-server`
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2. Configuring MariaDB: `sudo mysql_secure_installation`
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這步驟會問幾個問題，大概是：
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1. 輸入目前root的密碼
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2. 是否要切換為unix_socket？ -> No
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3. 要變更root的密碼嗎？-> No
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3. Testing MariaDB: `sudo systemctl status mariadb`
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4. Show version: `sudo mysqladmin version`
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## Syntax
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### Basic
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login as root: `mysql -u root -p`
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### User management
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#### Create user
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```sql
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CREATE USER 'testuser'@'localhost' IDENTIFIED BY 'test123test!';
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```
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#### Remove user
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```sql
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DROP USER 'testuser'@'localhost';
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```
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#### Grant user's permission
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Below commands grant user's permission to *CREATE* and *DROP*.
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```sql
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GRANT CREATE ON *.* TO 'testuser'@'localhost';
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GRANT DROP ON tutorial_database.* TO 'testuser'@'localhost';
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FLUSH PRIVILEGES;
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```
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#### Remove user's permission
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```sql
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REVOKE <permission> ON database.table FROM 'user'@'localhost';
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```
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上面命令中的`<permission>`必須替換成下面的其中一個：
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- ALL - Allow complete access to a specific database. If a database is not specified, then allow complete access to the entirety of MySQL.
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- CREATE - Allow a user to create databases and tables.
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- DELETE - Allow a user to delete rows from a table.
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- DROP - Allow a user to drop databases and tables.
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- EXECUTE - Allow a user to execute stored routines.
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- GRANT OPTION - Allow a user to grant or remove another user's privileges.
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- INSERT - Allow a user to insert rows from a table.
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- SELECT - Allow a user to select data from a database.
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- SHOW DATABASES- Allow a user to view a list of all databases.
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- UPDATE - Allow a user to update rows in a table.
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例如：`REVOKE CREATE ON *.* FROM 'testuser'@'localhost';`
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最後，不要忘記`FLUSH PRIVILEGES;`
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#### Show user's permission
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```sql
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SHOW GRANTS FOR 'testuser'@'localhost';
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```
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#### Change user's password
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```sql
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ALTER USER 'user-name'@'localhost' IDENTIFIED BY 'NEW_USER_PASSWORD';
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```
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#### View all users
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```sql
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SELECT User,Host FROM mysql.user;
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```
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### Database
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#### Show all databases
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```sql
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SHOW DATABASES;
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```
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### Create table
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The rule:
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```sql
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CREATE TABLE table_name (column_name column_type);
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```
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Example:
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```sql
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CREATE TABLE tutorials_tbl(
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tutorial_id INT NOT NULL AUTO_INCREMENT,
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tutorial_title VARCHAR(100) NOT NULL,
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tutorial_author VARCHAR(40) NOT NULL,
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submission_date DATE,
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PRIMARY KEY ( tutorial_id )
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);
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```
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```sql
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use autostation;
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CREATE TABLE station_state(
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id CHAR(255) NOT NULL,
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ip CHAR(255) NOT NULL,
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dhcp_ip CHAR(255) NOT NULL,
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name CHAR(255) NOT NULL,
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setupfilemd5 CHAR(255) NOT NULL,
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setupfileversion CHAR(255) NOT NULL,
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status CHAR(255) NOT NULL,
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update_time DATETIME NOT NULL,
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PRIMARY KEY ( id )
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);
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```
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### Insert
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The rule:
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```
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INSERT INTO <table_name> ( field1, field2,...fieldN )
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VALUES
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( value1, value2,...valueN );
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```
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Example:
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```
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INSERT INTO client_state ( field1, field2,...fieldN )
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VALUES
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( value1, value2,...valueN );
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```
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## 參考
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- [Create a MySQL User on Linux via Command Line | Liquid Web](https://www.liquidweb.com/kb/create-a-mysql-user-on-linux-via-command-line/)
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- [Grant Permissions to a MySQL User on Linux via Command Line | Liquid Web](https://www.liquidweb.com/kb/grant-permissions-to-a-mysql-user-on-linux-via-command-line/)
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- [Remove Permissions for a MySQL User on Linux via Command Line - Liquid Web](https://www.liquidweb.com/kb/remove-permissions-for-a-mysql-user-on-linux-via-command-line/)
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- [Remove a MySQL User on Linux via Command Line - Liquid Web](https://www.liquidweb.com/kb/remove-a-mysql-user-on-linux-via-command-line/) |