Hive Joins Hive Joins Join Syntax Examples MapJoin Restrictions Join Optimization Predicate Pushdown in Outer Joins Enhancements in Hive Version 0.11 Join Syntax Hive supports the following syntax for joining tables: join_table:     table_reference J…

LanguageManual WindowingAndAnalytics     Skip to end of metadata   Added by Lefty Leverenz, last edited by Lefty Leverenz on Aug 01, 2014  (view change) show comment Go to start of metadata   Windowing and Analytics Functions Windowing and Analytics…

Lateral View Syntax Description Example Multiple Lateral Views Outer Lateral Views Lateral View Syntax lateralView: LATERAL VIEW udtf(expression) tableAlias AS columnAlias (',' columnAlias)* fromClause: FROM baseTable (lateralView)* Description Later…

Union Syntax select_statement UNION ALL select_statement UNION ALL select_statement ... UNION is used to combine the result from multiple SELECT statements into a single result set. Hive currently only supports UNION ALL (bag union), in which duplica…

Join Optimization Join Optimization Improvements to the Hive Optimizer Star Join Optimization Star Schema Example Prior Support for MAPJOIN Limitations of Prior Implementation Enhancements for Star Joins Optimize Chains of Map Joins Current and Futur…

Hive Operators and User-Defined Functions (UDFs) Hive Operators and User-Defined Functions (UDFs) Built-in Operators Relational Operators Arithmetic Operators Logical Operators Complex Type Constructors Operators on Complex Types Built-in Functions M…

LanguageManual ImportExport     Skip to end of metadata   Added by Carl Steinbach, last edited by Lefty Leverenz on May 14, 2013  (view change) show comment Go to start of metadata   Import/Export Import/Export Overview Export Syntax Import Syntax Ex…

LanguageManual DML Hive Data Manipulation Language Hive Data Manipulation Language Loading files into tables Syntax Synopsis Notes Inserting data into Hive Tables from queries Syntax Synopsis Notes Dynamic Partition Inserts Example Additional Documen…

Alter Table/Partition/Column Alter Table Rename Table Alter Table Properties Alter Table Comment Add SerDe Properties Alter Table Storage Properties Additional Alter Table Statements Alter Partition Add Partitions Dynamic Partitions Rename Partition…

hive语法规则LanguageManual DDL SQL DML 和 DDL 数据操作语言 (DML) 和 数据定义语言 (DDL) 一.数据库 增删改都在文档里说得也很明白,不重复造车轮 二.表 1.创建table重点解析如下 Create Table eg1:基础创建方式 create table if not exists default.cenzhongman ( ip string COMMENT 'this is ip', name string ) COMMENT 'this…