数据库【mysql】之pymysql

安装模块

pip install pymysql

导入模块

import pymysql

创建链接

conn = pymysql.connect(host='192.168.226.150', port=3306, database='python04', user='root', password='')

创建索引

cursor = conn.cursor()

查找

sql = "select * from userinfo"
cursor.execute(sql)
r = cursor.fetchone()
# 获取所有
# r = cursor.fetchall()
print(r)

增加

sql = "insert into userinfo(username,password) values(%s,%s)"
# 返回受影响的行数
r = cursor.execute(sql,['root',''])
print(r)
conn.commit()
cursor.close()
conn.close()

批量增加  executemany

sql = "insert into userinfo(username,password) values(%s,%s)"
# laoer  laoer_pass
# laosan laosan_pass
r = cursor.executemany(sql,[('laoer','laosan'),('laoer_pass','laosan_pass')])
print(r)
conn.commit()
cursor.close()
conn.close()

修改

sql = "update userinfo set password=%s where username ='tang'"
r = cursor.executemany(sql,('',))
conn.commit()
cursor.close()
conn.close()

删除

sql = "delete from userinfo WHERE username=%s"
r = cursor.executemany(sql,('root',))
conn.commit()
cursor.close()
conn.close()