What are distinct operators in impala?
Answer / Sudhir Singh Rajput
Distinct operators in Impala are used to return unique rows from a table or query result. The DISTINCT keyword can be used with SELECT statements, and the DISTRIBUTE BY clause can be used for parallel processing.
| Is This Answer Correct ? | 0 Yes | 0 No |
How can it help for avoiding costly modeling?
Is avro supported?
What features from relational databases or hive are not available in impala?
How is impala metadata managed?
Is impala intended to handle real time queries in low-latency applications or is it for ad hoc queries for the purpose of data exploration?
How does impala compare to hive and pig?
How apache impala works with cdh?
Why do I have to use refresh and invalidate metadata, what do they do?
What is impala’s aggregation strategy?
What impala use for authentication?
What happens when the data set exceeds available memory?
Can I use impala to query data already loaded into hive and hbase?
Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)
Apache Spark (991)
Apache HBase (164)
Apache Flume (95)
Apache Impala (72)
Apache Cassandra (392)
Apache Mahout (35)
Apache Sqoop (82)
Apache ZooKeeper (65)
Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)
Apache Avro (26)
Apache Presto (15)
Apache Tajo (26)
Hadoop General (407)