It helps change the Hive job settings for an exact query. For example, the following command shows that buckets are occupied according to the table definition: hive> SET hive.enforce.bucketing=true; We can see the current value of any property by using SET with the property name. SET will...
Indexing in Hive is a Hive query optimization technique, and it is mainly used to speed up the access of a column or set of columns in a Hive database. With the use of the index, the Hive database system does not need to read all rows in the table, especially that one has selected...
Partitioningin Hive refers to dividing the table into small parts based on the values of a particular column, like name, date, course, city, etc. Partitioning allows effective data organization, and it improves query performance. Executing a query reduces the amount of scanned data. Hadoop Distri...
HiveServer2 handled concurrent requests from more than one client, so it was replaced by HiveServer1. Hive Driver:The Hive driver receives the HiveQL statements submitted by the user through the command shell and creates session handles for the query. Hive Compiler:Metastore and hive compiler bot...
Data Warehouse Interview Questions for Freshers 1. What do you mean by data mining? Differentiate between data mining and data warehousing. Data mining is the process of collecting information in order to find patterns, trends, and usable data that will help a company to make data-driven decisio...
–-query <SQL query> Example: sqoop import –connect jdbc:mysql://db.one.com/corp --table INTELLIPAAT_EMP --where “start_date> ’2016-07-20’ ” sqoopeval –connect jdbc:mysql://db.test.com/corp –query “SELECT * FROM intellipaat_emp LIMIT 20” sqoop import –connect jdbc:mysql...
Power bi will run query for resultset I doubt this will work in that case Try if with works With TEMP1 as ( select * from Table1) select * from TEMP1 !! Power BI 101 Interview questions !! !! Master Microsoft Fabric- 36 Videos !! Microsoft Power BI Learning Resources, ...
Top 50 Apache Hive Interview Questions and Answers (2016)by Knowledge Powerhouse Apache Hive Query Language in 2 Days: Jump Start Guide (Jump Start In 2 Days Series Book 1) (2016)by Pak Kwan Apache Hive Query Language in 2 Days: Jump Start Guide (Jump Start In 2 Days Series) (Volume ...
ORC (optimized record columnar) is great when it comes to hive performance tuning. We can improve the query performance using ORC file format easily. You can checkHadoop file formatsin detail here. There is no barrier like in which table you can use ORC file and in response, you get faste...
Follows multi-query approach to avoid multiple scans of the datasets. Pig is easy if you are well aware with SQL Pig provides nested data types like Maps, Tuples and Bags which are not available for usage in MapReduce Pig also provides support to major data operations like Ordering, Filters...