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The Best Way to Merge Walmart Marketplace and Facebook Marketplace Data for Monthly Sales Reporting

If you're doing monthly sales reporting by hand right now, here's the fastest path from "two exports" to "one usable sheet," and why the manual version keeps breaking.

Step by step

  1. Decide your target columns once. Most people settle on Date, Channel, Order ID, and Total — set that up in CSV Experts and you won't redo it.
  2. Import the Walmart Marketplace file first. The first time you see this file shape, you map each of its columns to your target list.
  3. Import the Facebook Marketplace file the same way. Its columns get mapped once too — after that, every future file with this shape merges with no extra clicks.
  4. Check the merged totals. Dates and numbers are normalized automatically, so a European "24,00" and a US "24.00" both land as the same value.
  5. Export. CSV or Excel, ready for monthly sales reporting.

What actually goes wrong if you do this by hand

Walmart Marketplace gives you an Order Date column separate from the ship-by date, while Facebook Marketplace gives you an order date recorded through Meta's commerce backend — line those up manually across a few hundred rows and it's easy to miscount a week. On top of that, Walmart Marketplace's export each order line can appear as its own row with a repeated order ID, similar to Shopify's line-item export, and Facebook Marketplace's many sellers use Marketplace only for listings with no built-in checkout, so exports may only exist via a connected store's own platform. Individually those are minor quirks; combined into one spreadsheet by hand, they're where most reconciliation errors for monthly sales reporting actually come from.

Why it matters for monthly sales reporting

A monthly sales report across channels needs one date format and one revenue column, not a per-platform patchwork.

Try it with your own files →

Just want the quick column-difference reference instead? See the short version.

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