# Merge Two CSV Files and Remove Duplicates

**Use case:** 

Combine two CSV lists into one and remove duplicate rows by email, ignoring upper and lower case. Each row shows which list it came from, and the result is sorted by sign-up date with a CSV file to download. The data is pasted in, so it runs without files. Replace it with your own CSV text or file links.

## Input

```json
{
  "inlineSources": [
    {
      "name": "shop-newsletter",
      "format": "csv",
      "text": "email,name,city,signup\nmia@example.com,Mia Fischer,Berlin,2024-01-12\nnoah@example.com,Noah Brandt,Hamburg,2024-02-03\nlena@example.com,Lena Vogel,Munich,2024-02-20\nomar@example.com,Omar Haddad,Berlin,2024-03-05\n"
    },
    {
      "name": "event-signups",
      "format": "csv",
      "text": "email,name,city,signup,source_event\nNOAH@example.com,Noah Brandt,Hamburg,2024-02-03,spring-fair\nlena@example.com,Lena Vogel,Munich,2024-02-20,spring-fair\npaula@example.com,Paula Weber,Cologne,2024-04-18,spring-fair\nquinn@example.com,Quinn Roth,Berlin,2024-04-22,spring-fair\n"
    }
  ],
  "sourceField": "source",
  "dedupeMode": "keys",
  "dedupeKeys": [
    "email"
  ],
  "dedupeKeep": "first",
  "dedupeCaseInsensitive": true,
  "filters": [
    {
      "field": "plan",
      "op": "notEquals",
      "value": "free"
    }
  ],
  "filterMode": "and",
  "filterCaseSensitive": false,
  "flatten": false,
  "sortBy": [
    "signup"
  ],
  "exports": [
    "csv"
  ],
  "exportName": "merged-contacts",
  "escapeFormulas": true,
  "maxItems": 100000,
  "maxFileSizeMb": 50,
  "csvInferTypes": true
}
```

## Output

```json
{
  "email": {
    "label": "Email",
    "format": "string"
  },
  "name": {
    "label": "Name",
    "format": "string"
  },
  "country": {
    "label": "Country",
    "format": "string"
  },
  "plan": {
    "label": "Plan",
    "format": "string"
  },
  "signup": {
    "label": "Signup",
    "format": "string"
  },
  "company": {
    "label": "Company",
    "format": "string"
  },
  "source": {
    "label": "Source",
    "format": "string"
  }
}
```

## How it works

### 1. Sign up on Apify or log in

The Merge Datasets & Dedupe: Combine, Filter, Export CSV & Excel Actor is ready to run with the inputs already set for "Merge Two CSV Files and Remove Duplicates". [Sign up or log in](https://console.apify.com/create-task-from-example/r3Rywbqb9mVzl04Rb) and you'll land in Apify Console with a copy of this exact task.

### 2. Start the "Merge Two CSV Files and Remove Duplicates" task

The Merge Datasets & Dedupe: Combine, Filter, Export CSV & Excel Actor will start running based on the input automatically. You can also change all the input fields, like pasted data (inline sources), source column name, and more, to match your specific use case.

### 3. Receive the "Merge Two CSV Files and Remove Duplicates" output

Monitor the progress in real time. You will be notified as soon as your dataset is complete and ready for review. Each result includes data such as email, name, country, and more.

### 4. Integrate into your workflow

The final output is delivered in JSON, CSV, or Excel format, ready to be plugged into your workflow. You can also [run the "Merge Two CSV Files and Remove Duplicates" task via API](https://apify.com/data-done-right/merge-datasets.md).

## About this Actor

This example demonstrates how to use [Merge Datasets & Dedupe: Combine, Filter, Export CSV & Excel](https://apify.com/data-done-right/merge-datasets.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/data-done-right/merge-datasets.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

This Task's input is already configured above. Use it as-is rather than inventing a new one.

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/data-done-right/merge-datasets.md

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).