What is the difference between view and table in Hive?

The view is a standard Relational database management concept, which is similar to that in SQL. It does not support materialized views, but this view has an advantage like other features of Apache Hive. The major difference between a view and a table is that view does not store data; it is just a logical construct.

When use managed table and external table in Hive?

Use managed tables when Hive should manage the lifecycle of the table, or when generating temporary tables. Use external tables when files are already present or in remote locations, and the files should remain even if the table is dropped.

How do you know if a Hive table is internal or external?

For external tables Hive assumes that it does not manage the data. Managed or external tables can be identified using the DESCRIBE FORMATTED table_name command, which will display either MANAGED_TABLE or EXTERNAL_TABLE depending on table type.

What is the difference between internal and external tables?

An internal table data is stored in the warehouse folder, whereas an external table data is stored at the location you mentioned in table creation.

What is the difference between view and table?

The main difference between view and table is that view is a virtual table based on the result set of an SQL statement, while the table is a database object which consists of rows and columns that store data of a database. In brief, a programmer cannot create views without using tables.

What is the difference between external and managed tables?

The main difference between a managed and external table is that when you drop an external table, the underlying data files stay intact. With a managed table, the underlying directories and data get wiped out when the table is dropped.

What is Hive external table?

Hive External Table. External tables are stored outside the warehouse directory. They can access data stored in sources such as remote HDFS locations or Azure Storage Volumes. Whenever we drop the external table, then only the metadata associated with the table will get deleted, the table data remains untouched by Hive …

How are external tables created?

You follow these steps to create an external table: First, create a directory which contains the file to be accessed by Oracle using the CREATE DIRECTORY statement. Second, grant READ and WRITE access to users who access the external table using the GRANT statement. Third, create the external table by using the CREATE TABLE ORGANIZATION EXTERNAL statement.

What is an external table in Oracle?

An external table is a table that is NOT stored within the Oracle database. Data is loaded from a file via an access driver (normally ORACLE_LOADER) when the table is accessed.

What is a hive partition?

Hive Partitions is a way to organizes tables into partitions by dividing tables into different parts based on partition keys. Partition is helpful when the table has one or more Partition keys. Partition keys are basic elements for determining how the data is stored in the table.