> For the complete documentation index, see [llms.txt](https://documentation.ajaxsearchpro.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.ajaxsearchpro.com/general-settings/search-in-custom-fields/search-by-product-sku.md).

# Search By Product SKU

```
Search Sources -> Post Type Search -> Search in custom fields
```

### Regular engine (default)

* Under the **Search Sources -> Post Type Search** panel scroll down a bit until you see the **Search in all custom fields? ..or search in selected custom fields** option.
* Into the search input, type "sku". The field "\_sku" should show up.
* Drag the \_sku field to the right side and save the settings.

<figure><img src="/files/WjMGVmpj3Xzp3oYMMcG0" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/HLFoP6Oe9aJTeuw7fpJo" alt=""><figcaption></figcaption></figure>

### Index Table engine

For this to work, you need to have a [configured](/index-table.md#index-table) and [enabled](broken://pages/-L9jkL18TDdd1o8LThOk) index table engine.

* On the Index Table -> General panel scroll down until you see the **Index Custom Fields** option
* Into the search input type "sku"
* The field "\_sku" should display
* Drag the field to the right side, and save the settings
* Click the "Create new Index" button (green button on the top) to index the newly added field

![](/files/isd92pZA2xACo3pdQcTk)