How to retrieve randomized data rows from a postgreSQL table?

Question

I have a table on a PostgreSQL server database with almost 3 million rows and I need to save all rows to a CSV file. The problem here is that the rows must

Answer 1

See this question Selecting random rows

See this wonderful link Depesz MY THOUGHTS ON GETTING RANDOM ROW

Answer 2

Typically, you can just ORDER BY a random function of your database flavor, like

SELECT * FROM table ORDER BY RANDOM()

This might be as slow as shuffling the list, depending on the database server or product.