下载安装
pip3 install pymysql
-
pip install pymssql
-
-
pip install pymysql
使用操作
执行SQL
#!/usr/bin/env python # -*- coding:utf-8 -*- import pymysql # 创建连接 conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123', db='t1') # 创建游标 cursor = conn.cursor() # 执行SQL,并返回收影响行数
effect_row = cursor.execute("select * from data ")
print(cursor.fetchone()) 返回一个 print(cursor.fetchoall()) 返回全部 # 执行SQL,并返回受影响行数
#effect_row =
cursor
.
execute
(
"update hosts set host = '1.1.1.2' where nid > %s"
, (1,))
# 执行SQL,并返回受影响行数 #effect_row = cursor.executemany("insert into hosts(host,color_id)values(%s,%s)", data) # 提交,不然无法保存新建或者修改的数据 conn.commit() # 关闭游标 cursor.close() # 关闭连接 conn.close()
2、获取新创建数据自增ID
#!/usr/bin/env python # -*- coding:utf-8 -*- import pymysql conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123', db='t1') cursor = conn.cursor() cursor.executemany("insert into hosts(host,color_id)values(%s,%s)", [("1.1.1.11",1),("1.1.1.11",2)]) conn.commit() cursor.close() conn.close() # 获取最新自增ID new_id = cursor.lastrowid
3、获取查询数据
#!/usr/bin/env python # -*- coding:utf-8 -*- import pymysql conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123', db='t1') cursor = conn.cursor() cursor.execute("select * from hosts") # 获取第一行数据 row_1 = cursor.fetchone() # 获取前n行数据 # row_2 = cursor.fetchmany(3) # 获取所有数据 # row_3 = cursor.fetchall() conn.commit() cursor.close() conn.close()
注:在fetch数据时按照顺序进行,可以使用cursor.scroll(num,mode)来移动游标位置,如:
- cursor.scroll(1,mode=’relative’) # 相对当前位置移动
- cursor.scroll(2,mode=’absolute’) # 相对绝对位置移动