csv

require "csv"

class PeopleCsvStream
  include Enumerable

  HEADERS = %w[id full_name email signed_up_at plan].freeze

package importers

import (
  "context"
  "encoding/csv"
  "io"

class Order < ApplicationRecord
  belongs_to :customer

  scope :for_export, -> {
    select(:id, :reference, :total_cents, :currency, :created_at, :customer_id)
      .where.not(exported_at: nil)

-- Import CSV with COPY (fastest method)
COPY users (username, email, age, created_at)
FROM '/path/to/users.csv'
WITH (
  FORMAT csv,
  HEADER true,

import { Writable } from "node:stream";
import type { Pool } from "pg";

interface Row {
  email: string;
  name: string;

<?php

namespace App\Exports;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Carbon;

from sqlalchemy import select

from .models import Order, db


def stream_orders(batch_size=1000):

import csv


class _LineBuffer:
    def __init__(self):
        self._data = ""

from sqlalchemy import select
from sqlalchemy.orm import Session

from .models import User

BATCH_SIZE = 1000

package export

import (
	"encoding/csv"
	"log"
	"net/http"

use chrono::NaiveDate;
use rust_decimal::Decimal;
use serde::{Deserialize, Deserializer};

#[derive(Debug, Clone, Deserialize)]
pub struct Transaction {

@RestController
@RequestMapping("/api/exports")
public class ExportController {

    private final CsvStreamWriter csvStreamWriter;