Select Syntax WHERE Clause ALL and DISTINCT Clauses Partition Based Queries HAVING Clause LIMIT Clause REGEX Column Specification More Select Syntax GROUP BY SORT BY, ORDER BY, CLUSTER BY, DISTRIBUTE BY JOIN UNION ALL TABLESAMPLE Subqueries Virtual C…

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…

hive中select中DISTINCT的技巧和使用 单表的唯一查询用:distinct 多表的唯一查询用:group by 在使用MySQL时,有时需要查询出某个字段不重复的记录,虽然mysql提供有distinct这个关键字来过滤掉多余的重复记录只保留一条,但往往只用它来返回不重复记录的条数,而不是用它来返回不重复记录的所有值.其原因是distinct只能返回它的目标字段,而无法返回其它字段,用distinct不能解决的话,我只有用二重循环查询来解决,而这样对于一个数据量非常大的站来说,无疑…

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 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…

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…

Status of Hive Authorization before Hive 0.13 SQL Standards Based Hive Authorization (New in Hive 0.13) Restrictions on Hive Commands and Statements Privileges Objects Object Ownership Users and Roles Names of Users and Roles Role Management Commands…

Hive Concurrency Model Hive Concurrency Model Use Cases Turn Off Concurrency Debugging Configuration Locking in Hive Transactions Use Cases Concurrency support (http://issues.apache.org/jira/browse/HIVE-1293) is a must in databases and their use case…

EXPLAIN Syntax EXPLAIN Syntax Hive provides an EXPLAIN command that shows the execution plan for a query. The syntax for this statement is as follows: EXPLAIN [EXTENDED|DEPENDENCY|AUTHORIZATION] query AUTHORIZATION is supported from HIVE 0.14.0 via H…