python3连接mysql，oracle，hive

一、python3连接mysql

import MySQLdb

localhost = "10.79.2.40"
user = "root"
pwd = "root"
database = "mytest"
TABLE_NAME = "mytable"
conn = MySQLdb.connect(localhost,user,pwd,database,charset='utf8')

cursor = conn.cursor()
cursor.execute('SELECT * FROM %s WHERE FLAG = "Y"' %TABLE_NAME)
pairedlotflag = cursor.fetchall()

二、python3连接oracle

import os
import cx_Oracle as oracle

# os.environ['NLS_LANG'] = 'SIMPLIFIED CHINESE_CHINA.UTF8'  #保证编码一致
# os.environ['path'] =  'F:/MyTools/instantclient-12.2/instantclient_12_2/'  #使用即时客户端避免版本不兼容
or_cnn = oracle.connect("fabadm/[email protected]/unixtst") # 用户名/密码@主机名/实例名
cursor = or_cnn.cursor()

cursor.execute('select ARRAYPRODUCTNAME from bsodfpairinfo where rownum <10')
data = cursor.fetchone()
data = cursor.fetchall()

python3连接hive

from pyspark.sql import HiveContext
from pyspark import SparkConf, SparkContext

sc = SparkContext()
hiveContext = HiveContext(sc)

sql = "select * from table limit 3"
data = hiveContext.sql(sql_all)
data.show()

sc.stop()