The correct answer is FALSE. The file format can be defined at the stage, table, or copy into command.
Create Stage:
https://docs.snowflake.com/en/sql-reference/sql/create-stage.html
Create Table (STAGE_FILE_FORMAT option):
https://docs.snowflake.com/en/sql-reference/sql/create-table.html
Copy Into:
https://docs.snowflake.com/en/sql-reference/sql/copy-into-table.html
False.
In Snowflake, the COPY command does not necessarily require specifying a File Format in order to execute. The COPY command can be used to load data into a table from various file formats such as CSV, JSON, Avro, Parquet, etc.
When a file format is not explicitly specified in the COPY command, Snowflake attempts to automatically infer the file format based on the file's extension or internal file structure. This automatic file format inference feature is known as "automatic file format detection."
However, if the file format cannot be determined automatically or if you want to override the automatic detection, you can explicitly specify a File Format in the COPY command using the FILE_FORMAT parameter.
So, while specifying a File Format can provide more control and customization over the data loading process, it is not mandatory for the COPY command to execute successfully.
It is not mandatory to specify a FILE FORMAT for COPY operations. While it is not mandatory a FILE FORMAT should always be created for COPY into <table> operations and file unloading and COPY into <location> operations. Automatic inference should only be used with small sets of data and for testing or low importance data.
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