新增 Python

Python.md

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+
+## 記得安裝 pymysql
+```
+pip install pymysql
+```
+ 
+
+
+### 資料庫連線設定
+```
+import pymysql
+db = pymysql.connect(host='140.125.21.65', port=3307, user='VIP125', passwd='@VIPvip125', db='VIP125',
+                     charset='utf8')
+```
+
+
+### 建立操作游標
+```
+cursor = db.cursor()
+```
+
+### SQL語法（查詢資料庫版本）
+```
+sql = 'SELECT VERSION()'
+```
+
+### 執行語法
+```
+cursor.execute(sql)
+```
+
+### 選取第一筆結果
+```
+data = cursor.fetchone()
+print("Database version : %s " % data)
+
+```
+
+### 資料讀取(全部)
+```
+sql = "select * from test_0525_01"
+cursor.execute(sql)
+data = cursor.fetchall()
+print(f'ALL_data = {data}')
+```
+
+
+### 查詢資料(單獨)
+```
+sql = "SELECT user_id FROM test_0525_01;"
+cursor.execute(sql)
+data = cursor.fetchall()
+print(f'user_id = {data}')
+```
+
+
+### 查詢資料(某筆)
+```
+sql = "SELECT *  FROM test_0525_01 WHERE user_id='1000';"
+cursor.execute(sql)
+data = cursor.fetchall()
+print(f'user_id=1000 : {data}')
+
+```
+
+### 刪除資料
+```
+sql = "DELETE FROM test_0525_01 WHERE user_id='1001';"
+cursor.execute(sql)
+db.commit()
+```
+
+
+### 更新資料
+```
+sql = "UPDATE test_0525_01 SET user_name='user_update_1000' WHERE user_id='1000';"
+cursor.execute(sql)
+db.commit()
+```
+
+
+### 資料寫入
+```
+test_data = ['1001', 'test_1001']
+sql = "INSERT INTO test_0525_01 (user_id,user_name) VALUES (%s,%s);"
+cursor.execute(sql, test_data)
+db.commit()
+```
+
+
+### 關閉連線
+```
+db.close()
+```
+