This is a collection of articles regarding skewed tables in Hive that have been published on this website.
Skewed Values on Several Columns – Hive
Skewed tables are those in which some column values occur more frequently than others. As a result, the distribution is skewed. Hive will automatically separate skewed values into different files and take this into consideration during searches so that it can skip or include whole files if possible; thus enhances the performance. In this post,…
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Partitioned, Bucketed and Skewed Tables in Hive
When working with a large amount of data on a Hadoop file system, both partitioning and bucketing in Hive are used to avoid table scans and boost efficiency (HDFS). Tables are divided into smaller and more manageable pieces by defined partitions and/or buckets, which should possibly improve query performance. The way data is segregated is…
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Check if table is skewed – Apache Hive
As stated in the earlier article, Skewed tables are those in which some column values occur more frequently than others. As a result, the distribution is skewed. Hive will automatically separate skewed values into different files and take this into consideration during searches so that it can skip or include whole files if possible; thus enhances…
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Altering Skewed Tables in Hive
As we discussed in the earlier posts, Skewed tables are those in which some column values occur more frequently than others. As a result, the distribution is skewed. Hive will automatically separate skewed values into different files and take this into consideration during searches so that it can skip or include whole files if possible;…
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Apache Hive Skewed Tables Examples
As stated in the earlier article, Skewed tables are those in which some column values occur more frequently than others. As a result, the distribution is skewed. Hive will automatically separate skewed values into different files and take this into consideration during searches so that it can skip or include whole files if possible; thus…
Keep reading
Apache Hive – Skewed Tables
Skewed tables are those in which some column values occur more frequently than others. As a result, the distribution is skewed. Hive will automatically separate skewed values into different files and take this into consideration during searches so that it can skip or include whole files if possible; thus enhances the performance. Look at the…
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Big Data and SQL 