Top "Bigdata" questions

How to convert a Date String from UTC to Specific TimeZone in HIVE?

My Hive table has a date column with UTC date strings. I want to get all rows for a specific …

hadoop timezone hive bigdata hive-udf

Can large datasets be used with Excel 2013?

I've been reading in several places that Excel 2013 (64-bit) has the ability to open larger datasets, with more rows than …

excel bigdata excel-2013

MongoDB as file storage

i'm trying to find the best solution to create scalable storage for big files. File size can vary from 1-2 …

mongodb storage gridfs bigdata

Dynamodb query error - Query key condition not supported

I am trying to query my dynamodb table to get feed_guid and status_id = 1. But it returns Query key …

amazon-web-services bigdata amazon-dynamodb

Books to start learning big data

I would like to start learning about the big data technologies. I want to work in this area in the …

hadoop hbase hive pentaho bigdata

How to quickly export data from R to SQL Server

The standard RODBC package's sqlSave function even as a single INSERT statement (parameter fast = TRUE) is terribly slow for large …

sql sql-server r bigdata

PySpark DataFrames - way to enumerate without converting to Pandas?

I have a very big pyspark.sql.dataframe.DataFrame named df. I need some way of enumerating records- thus, being …

python apache-spark bigdata pyspark rdd

What is the difference between Big Data and Data Mining?

As Wikpedia states The overall goal of the data mining process is to extract information from a data set and …

hadoop machine-learning bigdata data-mining data-science

Hive padding leading zeroes

I need the output of a string column in my table as 13 length char, irrespective of whatever length it is, …

sql hive bigdata

Converting hdf5 to csv or tsv files

I am looking for a sample code which can convert .h5 files to csv or tsv. I have to read .…

csv bigdata hdf5