What is the difference between ‘select from table’ and ‘select column from table’ in hive ?
Answer : Table in Hive is stored as a directory in the HDFS…
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how will you optimize hive performance
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What is the Difference between apache hive and impala ?
Answer : Hive generates query expressions at compile
time…
What is a tool for tuning hive queries ?
Answer : By doing compression at various phases (i.e. on final output, intermediate data),we achieve performance improvement in Hive Queries.
