The Hive partition table can be created using PARTITIONED BY clause of the CREATE TABLE statement. The advantage of partitioning is that since the data is stored in slices, the query response time becomes faster. In the Hive DML example shown here, the powerful technique in Hive known as Create Table As Select, or CTAS is illustrated. show partitions in Hive table Partitioned directory in the HDFS for the Hive table 테이블을 하나 이상의 키로 파티셔닝(partitioning) 할 수 있다. Here we need to mention the New table name after the Create Table statement and the Older table name should be after the Select * From statement. So, first, we will create a students table as below: Article Directory First, hql build table syntax format 2. Here we need to mention the New table name after the Create Table statement and the Older table name should be after the Select * From statement. CREATE TABLE STUDENT ( STD_ID INT, STD_NAME STRING, STD_GRADE STRING ) PARTITIONED BY (COUNTRY STRING, CITY STRING) CLUSTERED BY (STD_GRADE) INTO 3 BUCKETS STORED AS TEXTFILE; e.g, Partition key could be one or multiple columns. I. With the basic CREATE TABLE syntax, you must list one or more columns, its name, type, and optionally a comment, in addition to any columns used as partitioning keys. CREATE TEMPORARY external TABLE emp.employee_tmp2(id int); ]table_name [(col_name data_type [COMMENT col_comment], … [constraint_specification])] [COMMENT table_comment] [ [ROW FORMAT row_format] //The separator and format of each row [STORED AS file_format] | STORED BY ‘storage.handler.class.name’ [WITH SERDEPROPERTIES (…)] – (Note: Available in Hive 0.6.0 and later) ] [LOCATION hdfs_path] [TBLPROPERTIES (property_name=property_value, …)] – (Note: Available in Hive 0.6.0 and later) eg:create table IF NOT EXISTS default.log_20150913( ip string COMMENT ‘remote ip address’, users string COMMENT ‘users’, req_url string COMMENT ‘user request url’) COMMENT ‘beifeng web access logs’ ROW FORMAT DELIMITED FIELDS TERMINATED BY ’ ’ STORED AS TEXTFILE ; //Split the table, improve the analysis rate 2. Hive partition breaks the table into multiple tables (on HDFS multiple subdirectories) based on the partition key. set hive.enforce.bucketing = true; INSERT OVERWRITE TABLE bucketed_user PARTITION (country) SELECT firstname , lastname , address, city, state, post, phone1, phone2, email, web, country FROM temp_user; set hive.exec.dynamic.partition=true; set hive.exec.dynamic.partition.mode=nonstrict; set hive.exec.max.dynamic.partitions.pernode=1000; set hive.enforce.bucketing = true; DROP TABLE IF … Therefore, when we filter the data based on a specific column, Hive does not need to scan the whole table; it rather goes to the appropriate partition which improves the performance of … The ALTER TABLE statement will create the directories as well as adding the partition details to the Hive metastore. This page shows how to create partitioned Hive tables via Hive SQL (HQL). CREATE TABLE AS SELECT: ... -- We expect this CTAS to fail because non-key column S -- comes after key columns YEAR and MONTH in the select list. Create Table optional clauses; Hive Create Table & Insert Example PARTITION BY - An optional parameter that can only be used to create temporary tables with the Parquet data format. How to Create Partitions in Hive? We have also covered various advantages and disadvantages of Hive partitioning. Create partitioned table-----create table txnrecsByCat(txnno INT, txndate STRING, custno INT, amount DOUBLE, product STRING, city STRING, state STRING, spendby STRING) partitioned by (category STRING) clustered by (state) INTO 10 buckets row format delimited fields terminated by ',' stored as textfile; J. Configure Hive to allow partitions you can also use OVERWRITE to remove the contents of the partition and re-load. In Hive 0.8.0 and later releases, CREATE TABLE LIKE view_name creates a table by adopting the schema of view_name (fields and partition columns) using defaults for … CREATE TABLE ctas_t1 PRIMARY KEY (id) PARTITION BY HASH (id) PARTITIONS 10 STORED AS KUDU AS SELECT id, s FROM kudu_t1; Consider a table named Tab1. It can be a regular table, a view, a join construct or a subquery. Here is an example of CREATE TABLE AS SELECT syntax for a Kudu table: -- The CTAS statement defines the primary key and partitioning scheme. Could you please explain me How to select a column for a partition? Example : Create Table as Select in Hive. If a table with the same name already exists, an exception is thrown; the use... Hive partition table   1.