The uses of SCHEMA and DATABASE are interchangeable – they mean the same thing. Managed or internal tables that are controlled by the hive when it comes to their data and metadata. However, managed tables are less convenient for sharing with other tools. If the statement that is returned uses a CREATE TABLE command, copy the statement and replace CREATE TABLE with CREATE EXTERNAL TABLE. This chapter explains how to create a table and how to insert data into it. If this happens only in this mode, then it is a minor inconvenience. The data is left in the original location and in the original format. One of such features is DROP COLUMNS using ALTER TABLE statements. hive -e " use test_bigdata; drop table data_result; CREATE table data_result( c1 String, c2 string ) ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t' STORED AS INPUTFORMAT 'com.hadoop.mapred.DeprecatedLzoTextInputFormat' OUTPUTFORMAT 'org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat' LOCATION '/output/20200618';" Step 2: Issue a CREATE EXTERNAL TABLE statement. When we drop a managed table (see Dropping Tables), Hive deletes the data in the table. ROW FORMAT: Tells Hive how the data is formatted. There are two approaches that you can follow if you want to drop column from Hive table: Use ALTER TABLE with REPLACE option; Create intermediate or temporary table CREATE DATABASE was added in Hive 0.6 ().. See the full job below. This may be required for Hive compatibility. The conventions of creating a table in HIVE is quite similar to creating a table using SQL. Hive views. 4. If PURGE is specified, then data is lost completely. DROP TABLE: If the table already exists, delete it. I hope your day is going well. Use SERDEPROPERTIES with CREATE TABLE to set up metadata that defines how tables are read and written. Hive> CREATE VIEW emp_dept AS SELECT * FROM emp JOIN dept ON (emp.dno=dept.deptno) WHERE ename =’Andrew’; A user can drop the view in the same way as the table. This may be required for Hive compatibility. USE WITH SERDEPROPERTIES with CREATE TABLE to specify the SerDe classes that read and write data for a table. Create Table Statement. In this article, we will check Hive drop column alternative with some examples. In Hive, we have two kinds of tables available. Hive Drop Column Alternative. The WITH DBPROPERTIES clause was added in Hive 0.7 ().MANAGEDLOCATION was added to database in Hive 4.0.0 ().LOCATION now refers to the default directory for external tables and MANAGEDLOCATION refers to the default directory for managed tables. 1.- A table called "Test" is created by a sqoop import job using "--create-hcatalog-table". EXTERNAL ensures that Spark SQL does not delete your data if you drop the table. And the second type of tables is the External table, hive only control metadata for these tables. The DROP TABLE statement in Hive deletes the data for a particular table and remove all metadata associated with it from Hive metastore. In this tutorial we will dive deep to learn more about these two types of tables. If PURGE is not specified then the data is actually moved to the .Trash/current directory. Running in local mode with 'set hive.stats.dbclass=jdbc:derby'. Hello guys! Hive views are similar to SQL views which reduce the Hive query complexity by encapsulating the complex queries from end users. CREATE EXTERNAL TABLE: Creates a new external table in Hive. Something really weird (at least for me) is happening when I drop a table in Hive. The syntax and example are as follows: Syntax DROP TABLE in Hive. External tables only store the table definition in Hive. You can omit the TBLPROPERTIES field. Create Table is a statement used to create a table in Hive. CREATE TABLE AS SELECT For example, suppose we have data that is created and used primarily by Pig or other tools, but we want to run some queries against it, but not give Hive ownership of the data.