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Postgres copy12/5/2023 To do this, we alter our previous \copy command to include only the column names we went. You can also specify PostgreSQL to export the table with only a subset of the table’s columns. Step 2: Confirm successful exportĪdditionally, if we open the file, we’ll see that our CSV is formatted correctly with the expected data: CSV data export \copy export with specific columns This reply tells us that our statement was executed successfully and a new file with the name books-read-export-2.csv has been written to the specified file location. \copy ( SELECT * FROM booksRead) to '/Users/ajemerich/books-read-export-2.csv' with csv header To export a PostgreSQL table to CSV, we need to specify the table to export, the location to export the file to, the delimiter, and lastly if the file includes a row for headers. The \copy command method has the same steps as the COPY statement method with changes in the syntax. You can read more about \copy in the Official PostgreSQL Documentation. The \copy command is a built-in PostgreSQL command executed by psql. This method is best when you have access to a remote PostgreSQL database, but you don’t have file-writing permissions to use the COPY statement from the previous method. We can also export a PostgreSQL table to a CSV in the command line using the \copy command. We can confirm by opening the file: File export with partial data PostgreSQL export to CSV using the \copy command Our altered statement looks like the following:ĬOPY booksRead(book_title,book_author) TO '/Users/ajemerich/books-read-export-partial.csv' DELIMITER ',' CSV HEADER Įverything else remains the same, except we call the file books-read-export-partial.csv, and our CSV export will only include the book_title and book_author column data. To do this, we alter our previous COPY statement to include only the column names we went. To take things one step further, you can also specify PostgreSQL to export the table with only a subset of the table’s columns. To verify, we can navigate to the folder we specified and see that the new CSV file is indeed there: Newly exported CSV file locationĪdditionally, if we open the file, we’ll see that our CSV is formatted correctly with the expected data: CSV data export COPY export with specific columns This reply tells us that our statement was executed successfully and a new file named books-read-export.csv has been written to the specified file location. PostgreSQL replies with the following message: To use COPY to export a PostgreSQL table to CSV, we need to specify the table to export, the location to export the file to, the delimiter, and lastly if the file includes a row for headers.ĬOPY booksRead TO '/Users/ajemerich/books-read-export.csv' DELIMITER ',' CSV HEADER Step 1: Configure the export specifications ![]() You can read more about the COPY statement in PostgreSQL's Official Documentation. The COPY statement's function is to copy data between a file and a table or vice versa. The first method we will demonstrate is exporting our PostgreSQL table in the command line using the COPY statement. PostgreSQL export to CSV using the COPY statement CSV format will also make the data easy to integrate with other tools outside of PostgreSQL. Our exported CSV will include these columns in an easy-to-read spreadsheet format. | book_id | book_title | book_author | read_date | This statement asks for all of the records in the booksRead table and orders them by their book_id returning the following output: ![]() SELECT * FROM booksRead ORDER BY book_id ASC You can check the data in the table by using the SELECT SQL statement: ![]() This table was created including a book’s title, author, and date read using the following SQL statement: If you have read our guide on how to import CSV into PostgreSQL, we will use the same example. How to export a CSV file from PostgreSQL?īefore we begin exporting PostgreSQL data to CSV, we will briefly recap the data in our sample table. In this guide, we explore three different methods of PostgreSQL export to CSV: export using PostgreSQL COPYSQL statement, export using PostgreSQL \copy command, and lastly with the workflow automation tool n8n. Knowing the methods PostgreSQL has at its disposal makes your data tasks simpler. PostgreSQL offers several ways to export your data to CSV so that it can be used with other tools for reporting, analytics, or visualization. Regardless of the use case, taking data from one program and putting it in another is a key step in data management processes. Many applications support CSV import and export because of its easy-to-read plain text or tabular format.
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