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Pivot rows to columns in Hive

There are multiple use cases when we need to transpose/pivot table and Hive does not provide us with easy function to do so. Let me show you workaround for how to pivot table in hive.

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Hive - What is the difference between Collect Set and Collect List

There are many advanced aggregate functions in hive. Lets take a look at look at collect_set and collect_list and how can we use them effectively.

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Hive - Advanced Aggregations with Grouping sets, Rollup and cube

In this blog, we will take look at another set of advanced aggregation functions in hive.

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Apache Sqoop: Import Data to HDFS - Part 2

In second part of sqoop import, We will learn additional parameters for using Import more effectively.

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Apache Sqoop - Import data to HDFS

In this blog, we will learn how to use sqoop import command and its different parameters to move data to HDFS.

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Apache Sqoop Introduction

One reason which made Hadoop ecosystem popular is its ability to process different forms of data. But not all data is present in HDFS i.e Hadoop Distributed File System. We have been using relational databases to store and process structured data for a long time. That is why a lot of data still resides in RDBMS […]

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