hive
NoSql or MySQL for Data Analytics
We have a cluster (hadoop, pig) which churns data 350Gb (growing couple of GB a week). All these data need to be made available for Analytics.[详细]
2023-04-13 01:33 分类：问答how to write subquery and use "In" Clause in Hive
How can I use In clause in Hive I want to write something like this in Hive select x from y where y.z in (select distinct z from y) order by x;[详细]
2023-04-11 10:41 分类：问答How to load data to hive from HDFS without removing the source file?
When load data from HDFS to Hive, using开发者_如何学编程 LOAD DATA INPATH \'hdfs_file\' INTO TABLE tablename;[详细]
2023-04-08 11:56 分类：问答java.io.IOException: No LZO codec found, cannot run
I tried to use lzo in my hive script, but got this error message. It seemed that I did not have the class for lzo in the classpath.[详细]
2023-04-06 05:17 分类：问答Distinct on specific column in Hive
I am running Hive 071 I have a table, with mulitple rows, with the same column value e.g. x | y | ---------[详细]
2023-04-04 07:51 分类：问答Why Hive errors FileNotFoundException when a UDF use some external resource files but runs right at native?
A 开发者_高级运维UDF used some external resource files, then it error: \"java.io.FileNotFoundException: resource/placeMap.txt (No such file or directory)\",[详细]
2023-04-03 09:39 分类：问答Hadoop Hive DOUBLE type question
Quick Hive/Hadoop question from a new user. I have a DOUBLE column that has \"1.8E8\" for value, does it mean I reached the max value for DOUBLE?开发者_运维技巧[详细]
2023-04-02 17:14 分类：问答how to convert unix epoch time to date string in hive
I have a log file which contains timestamp column. The timestamp is in unix epoch time format. I want to create a partition based on a timestamp with partitions year, month and day.[详细]
2023-03-31 06:57 分类：问答Multiple volume & limit disk usage with Hadoop
I am using Hadoop to processing on large set of data. I set up a hadoop node to use multiple volumes : one of these volume is a NAS with 10To disk, and the other one is the local disk from server with[详细]
2023-03-30 04:46 分类：问答Embedded Brisk? Is it possible?
I\'m just getting ramped up on a new application and have decided to try out / learn Cassandra and use it for the back end.[详细]
2023-03-29 16:56 分类：问答
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