Writing data into files from queries

In this recipe, you will learn how to write data into a file from a query in Hive.

This part helps you insert data into a file with the help of a query; that is, the output of a query to be saved into a file. The general format of inserting data into a file is as follows:

Standard syntax:
INSERT OVERWRITE [LOCAL] DIRECTORY directory1 [ROW FORMAT row_format] [STORED AS file_format]SELECT select_statment FROM from_statment.

Hive extension (multiple inserts):
FROM from_statement
INSERT OVERWRITE [LOCAL] DIRECTORY directory1 select_statement1
[INSERT OVERWRITE [LOCAL] DIRECTORY directory2 select_statement2] ...

Where:

• [LOCAL]: Is an optional clause. If this clause is specified, the preceding command will look for the file in the local filesystem. The command will follow the file path in the local filesystem.

• [ROW FORMAT row_format]: Is an optional clause. With the help of this, we can specify the row format; that is, the delimiters or the fields terminated...