How to perform data import and export operations in Hive?

10 months ago

Jackson Davis

1 minute

Typically, data import and export operations in Hive are carried out using the LOAD DATA and INSERT OVERWRITE statements.

You can perform data import operation using the LOAD DATA statement, the syntax is as follows:

LOAD DATA [LOCAL] INPATH 'input_path' [OVERWRITE] INTO TABLE table_name [PARTITION (partition_key = 'partition_value')];

The input_path represents the data source path, and the table_name is the name of the target table. The LOAD DATA function will load the data from the specified path into the target table.

The data export operation can be achieved using the INSERT OVERWRITE statement with the following syntax:

INSERT OVERWRITE DIRECTORY 'output_path' [ROW FORMAT row_format] SELECT * FROM table_name [WHERE condition];

output_path is the path where the exported data is saved, and table_name is the name of the source table. INSERT OVERWRITE will export the query results to the specified path.

It’s important to note that for exporting data, you can also use the INSERT OVERWRITE LOCAL DIRECTORY statement to export data to the local file system.