python查询

#coding=utf-8
import MySQLdb
conn = MySQLdb.Connect(host = ‘127.0.0.1‘,port=3306,user=‘root‘,passwd=‘‘,db=‘test‘,charset=‘utf8‘)
cursor = conn.cursor()
sql = "select * from orders"
cursor.execute(sql)

#获取总记录数
print cursor.rowcount

#获取一条数据
rs = cursor.fetchone()
print rs

#获取3条数据,将从第二条开始
rs = cursor.fetchmany(3)
print rs

#获取所有数据，返回所有的数据
rs = cursor.fetchall()
print rs

cursor.close()
conn.close()