【python链接hive并提取数据】

在工作中我们经常会用到数据库中的数据，接下来我们就学习一下，如何快速的从python中读取hive库中的数据

首先我们安装一下python链接hive的包impyla，在impyla包安装的时候，就直接将其依赖的包thrift、pure-sasl、thrift_sasl都安装好了

pip install impyla

conn = connect(host = '172.16.211.30', port = 10000, user = "dw", auth_mechanism = 'PLAIN', password = "123456", database = "dws_xb")
cursor = conn.cursor()
sql = "select * from dws_xb.s_goods_orders where dt='2022-01-03' limit 100" # 这里是数据提取的sql语句
cursor.execute(sql)
data = df(cursor.fetchall()) # fetchall：提取全部数据，fetchone：提取一条数据
cursor.close()
conn.close()
'''
  host：主机地址
  port：端口号
  user：用户名称
  password：密码
  database：数据库名称
  这些参数可以询问数仓人员得知哦~
'''

conn = connect(host = '172.16.211.30', port = 10000, user = "dw", auth_mechanism = 'PLAIN', password = "123456", database = "dws_xb")
cursor = conn.cursor()
sql1 = 'show tables'
cursor.execute(sql1)
tables = df(cursor.fetchall())
data = df()
for i in tables[0]:
    print(i)
    sql = 'describe ' + i 
    cursor.execute(sql)
    data = data.append(df(cursor.fetchall()))
cursor.close()
conn.close()