How can you improve the performance of a Hive query that involves a large table join?
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There are various approaches, such as bucketing, partitioning, and map-side joins, that can be utilised to increase the performance of a Hive query that contains a large table join. Another method is to rely on caching, which includes caching the query results in memory so that subsequent queries can be conducted more rapidly. Caching can eat up a lot of memory, therefore it should be used carefully.