# Vendor Feed CSV Regression Check

**Use case:** 

Validate supplier feed updates by detecting removed SKUs and modified fields before importing into your catalog.

## Input

```json
{
  "csvA": "sku|vendor|cost|available\nA-100|North Supply|4.20|yes\nA-101|North Supply|8.10|yes\nB-200|West Goods|6.75|no",
  "csvB": "sku|vendor|cost|available\nA-100|North Supply|4.45|yes\nA-101|North Supply|8.10|no\nC-300|East Traders|11.00|yes",
  "keyColumns": [
    "sku",
    "vendor"
  ],
  "delimiter": "|",
  "hasHeader": true,
  "caseSensitive": true,
  "trimWhitespace": true,
  "outputFormat": "all-changes"
}
```

## Output

```json
{
  "changeType": {
    "label": "Change Type",
    "format": "text"
  },
  "rowKey": {
    "label": "Row Key",
    "format": "text"
  },
  "changedColumns": {
    "label": "Changed Columns",
    "format": "text"
  },
  "columnCount": {
    "label": "Columns Changed",
    "format": "number"
  },
  "data": {
    "label": "Row Data",
    "format": "text"
  }
}
```

## About this Actor

This example demonstrates how to use [CSV Diff Tool](https://apify.com/automation-lab/csv-diff-tool) with a specific input configuration. Visit the [Actor detail page](https://apify.com/automation-lab/csv-diff-tool) to learn more, explore other use cases, and run it yourself.