如何使用pyMySql连接mysql

import pymysql

# 创建连接

conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123456', db='test',charset="utf8" )

# 创建游标

cursor = conn.cursor()

# 执行SQL，并返回收影响行数

effect_row = cursor.execute("insert into t2 VALUES(1,'ray')")

# 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)", [("1.1.1.11",1),("1.1.1.11",2)])

# 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()

import pymysql

# 创建连接

conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123456', db='test',charset="utf8" )

# 创建游标

cursor = conn.cursor()

# 执行SQL，并返回收影响行数

truple_str='ray'

effect_row = cursor.execute("insert into t2 VALUES(3,%s)",truple_str)

print(effect_row)

truple_str='suen'

effect_row = cursor.execute("insert into t2 VALUES(4,%s)",truple_str)

print(effect_row)

# 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()

import pymysql

# 创建连接

conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123456', db='test',charset="utf8" )

# 创建游标

cursor = conn.cursor()

# 执行SQL，并返回收影响行数

truple_str=('lalala',1)

cursor.execute('update t2 set t_name=%s where t_id=%s',truple_str)

# 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()

import pymysql

# 创建连接

conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123456', db='test',charset="utf8" )

# 创建游标

cursor = conn.cursor()

# 执行SQL，并返回收影响行数

# truple_str=('lalala',1)

tid=1

cursor.execute('delete from t2 where t_id=%s',tid)

# 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()

import pymysql

# 创建连接

conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123456', db='test',charset="utf8" )

# 创建游标

cursor = conn.cursor()

# 执行SQL，并返回收影响行数

truple_str=[

    (5,'aaa'),

    (6,'bbb'),

    (7,'ccc'),

    (8,'ddd')

]

cursor.executemany("insert into t2 VALUES(%s,%s)",truple_str)

# 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()

import pymysql

# 创建连接

conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123456', db='test',charset="utf8" )

# 创建游标

cursor = conn.cursor()

# 执行SQL，并返回收影响行数

# truple_str=('lalala',1)

cursor.execute('select * from t2')

#fech 是去内存中获取

res = cursor.fetchone()

print(res)

res = cursor.fetchmany(7)  #指定获取的条目数

print(res)

res = cursor.fetchall()

print(res)

# 关闭游标

cursor.close()

# 关闭连接

conn.close()

import pymysql

# 创建连接

conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123456', db='test',charset="utf8" )

# 创建游标

cursor = conn.cursor()

# 执行SQL，并返回收影响行数

# truple_str=('lalala',1)

cursor.execute('select * from t2')

#fech 是去内存中获取

res = cursor.fetchone()

print(res)

res = cursor.fetchone()

print(res)

cursor.scroll(0,mode='absolute')

res = cursor.fetchall()

print(res)

cursor.scroll(-1,mode='relative')

res = cursor.fetchall()

print(res)

# 关闭游标

cursor.close()

# 关闭连接

conn.close()

import pymysql

# 创建连接

conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123456', db='test',charset="utf8" )

# 创建游标

cursor = conn.cursor()

# 执行SQL，并返回收影响行数

# truple_str=('lalala',1)

cursor.execute('select * from t2')

#fech 是去内存中获取

while 1:

    res = cursor.fetchone()

    if res == None:

        break

    print(res)

# 关闭游标

cursor.close()

# 关闭连接

conn.close()

import pymysql

# 创建连接

conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123456', db='test',charset="utf8" )

# 创建游标

cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)

# 执行SQL，并返回收影响行数

# truple_str=('lalala',1)

cursor.execute('select * from t2')

#fech 是去内存中获取

while 1:

    res = cursor.fetchone()

    if res == None:

        break

    print(res)

# 关闭游标

cursor.close()

# 关闭连接

conn.close()

import pymysql

# 创建连接

conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123456', db='test',charset="utf8" )

# 创建游标

cursor = conn.cursor()

cursor.executemany('insert into t3(t_name) VALUES (%s)',[('aaa07'),('aaa08'),('aaa09')])

conn.commit()

tid=cursor.lastrowid

print(tid)

# 关闭游标

cursor.close()

# 关闭连接

conn.close()