MySQL內建客戶端操作

• 檢視系統資料庫。

show databases

• 建立資料庫

CREATE TABLE 資料庫 DEFAULT CHARSET utf8 COLLATE utf8_general_ci;

使用utf8編碼，避免中文漢字問題。COLLATE 影響排序規則。

• 刪除資料庫

DROP DATABASE 資料庫名

CREATE DATABASE day25db DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
Query OK, 1 row affected (0.01 sec)

mysql> SHOW DATABASES;
 
+--------------------+
| Database           |
+--------------------+
| information_schema |
| day25db            |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
5 rows in set (0.00 sec)

DROP DATABASE day25db;

Query OK, 0 rows affected (0.02 sec)

• 進入資料庫

use 資料庫名

• 檢視資料庫中的表

show tables

mysql> use information_schema
Database changed
mysql> show tables;
+---------------------------------------+
| Tables_in_information_schema          |
+---------------------------------------+
| CHARACTER_SETS                        |
| COLLATIONS                            |
 

| COLLATION_CHARACTER_SET_APPLICABILITY |
| INNODB_SYS_FOREIGN                    |
| INNODB_SYS_TABLESTATS                 |
+---------------------------------------+

Python操作

#安裝pymysql模組

LeodeMBP:~ leo$ pip3 install pymysql
Collecting pymysql
  Downloading PyMySQL-1.0.2-py3-none-any.whl (43 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 43.8/43.8 KB 67.5 kB/s eta 0:00:00
Installing collected packages: pymysql
Successfully installed pymysql-1.0.2

#匯入pymysql
import pymysql

#建立資料庫連結物件至mysql資料庫
conn = pymysql.connect(host = '127.0.0.1' , port = 3306, user = 'root' , passwd = 'root123' , charset = 'utf8')

#建立遊標物件，基於遊標可以傳送指令。
cursor = conn.cursor()

#檢視系統的資料庫
cursor.execute('show databases')
result = cursor.fetchall()
print(result)
(('information_schema',), ('day25db',), ('mysql',), ('performance_schema',), ('sys',))　　

　#建立資料庫

　cursor.execute("CREATE DATABASE day25db DEFAULT CHARSET utf8 COLLATE utf8_general_ci")

　conn.commit()  #提交事務來儲存更改

 #刪除資料庫

  cursor.execute("DROP DATABASE day25db")

  conn.commit()

　#進入資料庫，檢視所有表

　cursor.execute("use mysql")

　cursor.execute("show tables")

　result = cursor.fetchall()

　print(result)

　#關閉連結

　cursor.close()

　conn.close()