QlikView is mainly in memory tool whereas Tableau has the feature of Live connection where you can directly connect to Hive using Hive connectors. As Tableau has the live connection, Tableau desktop won’t fetch underlying data in the local system to fire queries against it. Tableau will send the query to Hive which will be processed and the output of query will be fetched back to RAM.
As you have Hadoop cluster, executing queries on a cluster will be a faster approach hence we can get quick visualizations with Tableau live connection with Hadoop.
Hadoop course covers in-depth knowledge on Big Data and Hadoop Ecosystem tools such as HDFS, YARN, MapReduce, Hive, and Pig.
