Tables can also be given an alias, this is particularly common in join queries involving multiple tables where there is a need to distinguish between columns with the same name in different tables. The WHERE condition is a boolean expression. Hive supports three types of conditional functions. Hive supports a number of operators and UDFs in the WHERE clause: In this way, you have to create your own customized commands. Lets say we have a T_UpdatedData table which gets populated by Sqoop per day. Hadoop Hive supports the various Conditional functions such as IF, CASE, COALESCE, NVL, DECODE etc. SELECT statement is used to retrieve the data from a table. If on any data we have updated data from multiple partitions, we need to backup, delete those partitions from the T_ProductionData. For example, the following query returns only those sales records which have an amount greater than 10 from the US region. FROM (SELECT a.status, b.school, b.gender FROM status_updates a JOIN profiles b ON (a.userid = b.userid and a.ds='2009-03-20' ) ) subq1 The Hive Query Language (HiveQL) is a query language for Hive to process and analyze structured data in a Metastore. JPA and Hibernate - Criteria vs. JPQL or HQL. answered Sep 4 by MD • 89,290 points . This chapter explains how to use the SELECT statement with WHERE clause. ... After that use for loop and conditions to search your match. WHERE clause is used to FILTER out records from final result set. As HDFS/Hive supports append only. comment. These functions are listed below: IF( Test Condition, True Value, False Value ) The IF condition evaluates the “Test Condition” and if the “Test Condition” is true, then it returns the “True Value”. For example, let's say a team wants to create a Hive project using a particular template for new sales opportunities where: WHERE clause in HIVE. Hi, I'm having trouble getting a victory condition to work. I'm trying to get the trigger to acknowledge two different building types finishing construction (Barracks and Farm) and the number for each building type in order for the quest to be completed, but every time I try to add the second building type it won't work. For loop will iterate depends on the length of your data frames. Next example query combines group-by, joins and multi-table inserts. learn hive - hive tutorial - apache hive - hiveql select statement where condition - hive examples. 303. In addition to using operators to create new columns, there are also many Hive built‐in functions that can be used. Related. Following diagram shows various Hive Conditional Functions: Hive Conditional Functions Below table describes the various Hive conditional functions: Conditional Function Description … So we need to delete the partitions where data is modified and replace with updated data partitions. 18. how to write subquery and use “In” Clause in Hive. 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