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Data Append Merger

Vertically append and merge multiple data tables with intelligent column matching

Prefix to add to duplicate header names (e.g., "Table1_")

Key Facts

Category
Data Processing
Input Types
textarea, select, checkbox, text
Output Type
text
Sample Coverage
4
API Ready
Yes

Overview

The Data Append Merger is a powerful utility designed to vertically stack multiple data tables into a single, unified dataset using intelligent column matching to ensure data integrity.

When to Use

  • •When you need to combine multiple CSV or text-based reports that share the same structure.
  • •When you have fragmented data files that need to be consolidated into one master table for analysis.
  • •When you need to align columns across different datasets that may have slightly varying header names or positions.

How It Works

  • •Paste your data tables into the input area, ensuring they are separated by empty lines.
  • •Select your preferred alignment mode—Smart, By Position, or By Column Name—to dictate how columns are matched.
  • •Configure output settings such as header inclusion and missing value handling.
  • •Click to process and generate your consolidated, vertically merged dataset.

Use Cases

Consolidating monthly sales reports from different regional branches into a single annual master file.
Merging survey results collected from multiple sources into one comprehensive dataset for statistical analysis.
Combining fragmented log files into a single chronological table for easier troubleshooting.

Examples

1. Consolidating Regional Sales Data

Data Analyst
Background
The analyst receives separate CSV files from three different regional offices every month.
Problem
Manually copying and pasting rows from three files into one master sheet is tedious and prone to alignment errors.
How to Use
Paste the content of all three CSV files into the input area, select 'Smart' alignment, and ensure 'First Row Contains Headers' is checked.
Example Config
Alignment Mode: Smart; Fill Missing Values: Enabled; Include Headers: Yes
Outcome
A single, clean CSV output containing all regional data with columns perfectly aligned by header name.

2. Merging Survey Responses

Researcher
Background
A researcher has survey data collected via different forms that share most, but not all, question fields.
Problem
The datasets have different column orders and some missing fields, making them difficult to analyze together.
How to Use
Input all survey datasets, choose 'By Column Name' alignment to ensure matching questions line up, and enable 'Fill Missing Values'.
Example Config
Alignment Mode: By Column Name; Fill Missing Values: Enabled
Outcome
A unified table where all matching questions are aligned, with empty cells automatically inserted where specific surveys lacked certain questions.

Try with Samples

csv, hash
CSV Samples
Sample CSV files with various data types, sizes, and complexity levels
matched family csv
csv
Regex Replace Samples
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matched family csv
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Duplicate Line Samples
Sample files with various types of duplicate lines for testing duplicate removal tools
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Windows String Processing - C# Samples
Comprehensive C# string processing examples for Windows platform including string manipulation, splitting, joining, regex operations, and text analysis
matched family csv
csv

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FAQ

What does 'Smart' alignment mode do?

Smart mode combines both column position and header name matching to intelligently align data even if column orders differ slightly between files.

How are missing values handled?

If enabled, the tool will automatically fill missing cells with empty values to maintain the structure of the resulting table.

Can I merge files with different delimiters?

Yes, the tool includes an auto-detect feature for input delimiters to help process files with varying formats.

What happens if header names are duplicated?

You can specify a custom prefix in the 'Duplicate Header Prefix' field to distinguish between columns that share the same name.

Is there a limit to how many tables I can merge?

You can merge as many tables as your browser's memory allows, provided they are separated by empty lines in the input field.

API Documentation

Request Endpoint

POST /en/api/tools/data-append-merger

Request Parameters

Parameter Name Type Required Description
inputData textarea Yes -
delimiter select No -
hasHeaders checkbox No -
alignmentMode select No -
fillMissing checkbox No -
separator select No -
includeHeaders checkbox No -
duplicateHeaderPrefix text No Prefix to add to duplicate header names (e.g., "Table1_")

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-data-append-merger": {
      "name": "data-append-merger",
      "description": "Vertically append and merge multiple data tables with intelligent column matching",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=data-append-merger",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]