These are user-defined aggregating functions that operate row-wise or group-wise and output one row or one row for each group…
These are regular user-defined functions that operate row-wise and output one result for one row.Lets say we have a input…
Common join The common join is also called reduce side join. It is a basic join in Hive and works…
Local mode Hadoop can run in standalone, pseudo-distributed, and fully distributed mode. Most of the time, we need to configure…
Hive supports TEXTFILE, SEQUENCEFILE, RCFILE, ORC, and PARQUET file formats. The three ways to specify the file format are as…
Hive partitioning is one of the most effective methods to improve the query performance on larger tables. The query with…
Hive provides an EXPLAIN command to return a query execution plan without running the query. We can use an EXPLAIN…