Python连接MySQL数据库的简单便捷方法

pip install pymysql==1.0.2

pip list

import pymysql

db = pymysql.connect(host='localhost',
                     user='root',
                     password='dai324542',
                     database='runoob',
                     charset='utf8')
 
# 使用 cursor() 方法创建一个游标对象 cursor
cursor = db.cursor()
 
# 使用 execute()  方法执行 SQL 查询 
cursor.execute("SELECT VERSION()")
 
# 使用 fetchone() 方法获取单条数据.
data = cursor.fetchone()
 
print ("数据库连接成功！")
 
# 关闭数据库连接
db.close()

# 创建表
sql="""CREATE TABLE test (
          FIRST_  CHAR(20) NOT NULL,
          SECOND_  CHAR(20),
          THIRD_ INT,
          FOURTH_ CHAR(1),
          FIFTH_ FLOAT )"""
# 运行sql语句
cursor.execute(sql)

try:
    sql = "insert into test(FIRST_,SECOND_,THIRD_,FOURTH_,FIFTH_) values ('MAC','MOTH','20','M','2000')"
 
    # 运行sql语句
    cursor.execute(sql)
    # 修改
    db.commit()
    # 关闭游标
    cursor.close()
    # 关闭连接
    db.close()
    print("victory!")
except:
    print("false")

# 查询语句
try:
    cursor = db.cursor()
    sql = "select * from student"
    cursor.execute(sql)
    result = cursor.fetchall()
    for data in result:
        print(data)
except Exception:
    print("查询失败")

# SQL 删除语句
sql = "DELETE FROM student WHERE Sno='20111107'"
try:
   # 执行SQL语句
   cursor.execute(sql)
   # 向数据库提交
   db.commit()
except:
   # 发生错误时回滚
   db.rollback()
# 关闭连接
db.close()
# 成功提示
print("victory!")