# Compare Two Price Lists for Changes

**Use case:** 

See exactly which SKUs had a price or stock change, which were removed, and which are new, between two price list snapshots.

## Input

```json
{
  "oldData": [
    {
      "sku": "A100",
      "title": "Blue Widget",
      "price": 19.99,
      "stock": 42
    },
    {
      "sku": "A101",
      "title": "Red Widget",
      "price": 24.99,
      "stock": 0
    },
    {
      "sku": "A102",
      "title": "Green Widget",
      "price": 15.5,
      "stock": 8
    }
  ],
  "newData": [
    {
      "sku": "A100",
      "title": "Blue Widget",
      "price": 17.99,
      "stock": 30
    },
    {
      "sku": "A102",
      "title": "Green Widget",
      "price": 15.5,
      "stock": 8
    },
    {
      "sku": "A103",
      "title": "Yellow Widget",
      "price": 12,
      "stock": 100
    }
  ],
  "keyFields": [
    "sku"
  ],
  "ignoreFields": [
    "scrapedAt",
    "lastChecked",
    "timestamp"
  ],
  "includeUnchanged": false,
  "exportFormats": [],
  "maxItems": 0
}
```

## Output

```json
{
  "status": {
    "label": "Status",
    "format": "text"
  },
  "key": {
    "label": "Key",
    "format": "object"
  },
  "changedFields": {
    "label": "Changed fields",
    "format": "array"
  },
  "oldValues": {
    "label": "Old values",
    "format": "object"
  },
  "newValues": {
    "label": "New values",
    "format": "object"
  }
}
```

## About this Actor

This example demonstrates how to use [Dataset Diff & Change Detector](https://apify.com/nerolabs/dataset-diff-detector) with a specific input configuration. Visit the [Actor detail page](https://apify.com/nerolabs/dataset-diff-detector) to learn more, explore other use cases, and run it yourself.


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For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/nerolabs/dataset-diff-detector.md

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