How can I import files into a table in Hive?

1 year ago
William Carter
1 minute

There are several common methods through which files can be imported into a Hive table.

  1. LOAD DATA command: Use the LOAD DATA command in Hive to load files into a table. The syntax is as follows:
LOAD DATA INPATH 'path_to_file' INTO TABLE table_name;
  1. Use the INSERT INTO command: Insert file data into a table in Hive by using the INSERT INTO command. The syntax is as follows:
INSERT INTO TABLE table_name
SELECT * FROM external_table_name;
  1. Utilize Hive external tables: Create an external table and map the files directly to the external table. External tables allow users to access data from external storage systems in Hive without moving the data to Hive’s storage. The syntax is as follows:
CREATE EXTERNAL TABLE table_name (
  column1 type,
  column2 type,
  ...
) 
ROW FORMAT DELIMITED
FIELDS TERMINATED BY ','
LINES TERMINATED BY '\n'
LOCATION 'path_to_file';

There are several common methods for importing files into a Hive table, and the specific choice depends on your needs and environment.

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