我在CDH6集群上创建了一个orc文件。在这个orc文件的顶部创建了hive表。此表也是从presto使用presto单元连接器查询的。Presto安装在同一个CDH6集群上。当从presto_cli v/s hive_cli查询数据时会注意到时间差。单元-orcfiledump和单元查询都将时间戳列值返回为2021-11-08 15:09:50。
hive> select event_time from icampaign_message_history_dm where bintime=1636383600;
OK
**2021-11-08 15:09:50**
Time taken
提供以下用AWS Redhift编写的查询:
SELECT session_date,'min' as stats,mini as value,product,endpoint
from
(select
distinct trunc(joinstart_ev_timestamp) as session_date,
PERCENTILE_DISC(0.02) WITHIN GROUP (ORDER BY join_time) over(partition by
trunc(joinstart_ev_timestamp))/1000 as mini,
PERCENTILE_
有没有办法用Presto连接到netezza数据库?
2018-08-08T13:42:06.124-0400 ERROR Query-20180808_174205_00000_qwr8d-165 org.postgresql.Driver Connection error:
org.postgresql.util.PSQLException: A connection could not be made using the requested protocol null.
at org.postgresql.core.ConnectionFactory.openC
我试图添加一个新的列,它将计算每种包类型的百分比总数。
下面的代码将产生以下结果。
因此,我想在新的专栏中显示出在这一特定的一周中,占到的总数的百分比。
代码:
SET DATEFIRST 1
SELECT
DATEPART (wk, t0.U_ORC_BE_ProdDate) AS [Week Produced],
--Display week number of date produced
(
CASE
WHEN t5.U_ORC_BE_NAME LIKE '%Cans%'
THEN 'Cans'
WHEN
我希望将查询输出转换为python数据框以绘制折线图 import prestodb
import pandas as pd
conn=prestodb.dbapi.connect(
host='10.0.0.101',
port=8081,
user='hive',
catalog='hive',
schema='ong',
)
cur = conn.cursor()
query="SELECT dtime,tagName FROM machine where tagname is not null
limit
我有一个查询需要20秒才能执行,下面是我的查询:
SELECT MATLIGA.COD_MAT_FAMILIA
FROM
ORCAMENTOS.dbo.OR_1INSUMOS INSUMOS
INNER JOIN ORCAMENTOS.dbo.OR_MAT_GRUPOS GRUPOS ON (GRUPOS.EMPRESA='01' AND GRUPOS.FILIAL='01' AND GRUPOS.CODIGO_INTERNO = 'HOT' )
INNER JOIN ORCAMENTOS.dbo.OR_MATERIA