Exporting Table Data with Headers Using SELECT...INTO

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How do I export both the header and the data when using the SELECT...INTO clause?

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When using the SELECT...INTO clause to export table data to a CSV file, it's essential to include both the column headers and the data in the result set. To achieve this, you can use the UNION ALL statement in your SQL query.

Example of extracting the data in CSV format to S3:

Explanation:

1. Column Headers:

   • The first SELECT statement within the UNION ALL provides column headers ('ColName1', 'ColName2', 'ColName3') with aliases (AS Col1, Col2, Col3).

2. Data Rows:

   • The second SELECT statement retrieves the actual data from the specified table (<TABLE_NAME>).

3. Export to S3:

   • The INTO S3 clause specifies the S3 path ('testing/output') where the CSV file will be stored.

4. AWS Region and Credentials:

   • The CONFIG parameter sets the AWS region for the S3 bucket, and the CREDENTIALS parameter includes the necessary AWS credentials.

Note:

• Replace 'ColName1', 'ColName2', and 'ColName3' with the actual column names from your table.
• Review and update AWS credentials for security.

This query ensures that both column headers and data are exported to the CSV file, making it a comprehensive solution for exporting table data with headers.

Reference Links:

UNIONSELECT

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