As data has taken over the business world, it is crucial to understand the applications of data for analytical purposes. To ensure accurate data-driven results, we need to understand what is data mapping in ETL. Mapping of data is one of the most important steps in ETL (extract, transform, and load) processes. It involves creating a plan for where your data will come from, how it will be transformed, and where it will be stored. 

Mapping out your dataflows can help you avoid problems down the road and ensure that your data is properly cleansed and formatted for analysis. Although it is one of the main steps of ETL, do you understand what is data mapping in ETL? In this guide, we’ll walk you through the basics of data mapping and show you what is data mapping in ETL. 

What is Data Mapping in ETL? An In-Depth Overview

Before we get into the nitty-gritty details of what is data mapping in ETL, it is important to understand the basics of ETL and the data mapping concept.

What is ETL?

ETL is a process in data warehousing that involves extracting data from outside sources, transforming it to fit operational needs, then loading it into the end target database. ETL tools facilitate this process by enabling the rapid movement of data from many disparate sources into one central location.  ETL tools typically include a graphical interface that makes it easy to map out the transformation steps and monitor the progress of the ETL process. 

The exact steps involved in ETL will vary depending on the specific needs of the organization, but there are some common elements stated below. 


Data is extracted from the various source systems.


Next, it is transformed into the desired format, which may involve cleansing, aggregation, or other processes


 Finally, the transformed data is loaded into the target system.

ETL is a critical part of any data pipeline, and it requires a high degree of expertise to ensure that the data transform correctly and load into the target system accurately.

What is Data Mapping?


It is the process of creating a visual representation of data sets to better understand the relationships between them. This can be done with a variety of tools, including flow charts, diagrams, and even maps. The key is to find a way to represent the data that makes it easy to see patterns and trends. 

The Basic Applications

It is often used in fields such as market research, data analysis, and business intelligence. Individuals can better understand their data set through mapping. By mapping data, business owners can create data models. They map data to create data models for databases, data warehouses, or data lakes. 

It can also be used to convert data from one format to another, such as from CSV to JSON. Finally, organizations map data to find errors, such as incorrect values, incorrect data types, or missing values. 

No matter the application, it can be a helpful way to make sense of complex information. Ascend Analytics is here to help you make sense of the vast amount of data that enters your organization daily. We leverage data to generate analytical insights for businesses that enable their data-driven growth. 

By transforming data into visualizations, we make data-based decision-making an important part of every business. With the quickest time-to-value, Ascend Analytics resolves data-related challenges faced by firms in today’s fast-paced world.

A Complete Guide on What is Data Mapping in ETL

Are you wondering about what is data mapping in ETL? Take a look at our complete guide to find out your answers.

The Role of Data Mapping in ETL

In any data warehouse, the data must be accurate and consistent. Mapping data is an essential part of the Extract, Transform, Load (ETL) process that helps to ensure that data is properly converted from its source format to the target format. By creating a map of the data fields, ETL developers can ensure that all of the data is properly accounted for and transformed into the desired format. 

Additionally, the mapping of data can help to identify any errors or inconsistencies in the data, allowing developers to make the necessary corrections before the data is loaded into the warehouse. Without data maps, it would be difficult to guarantee the accuracy of a data warehouse. As such, mapping plays a vital role in the ETL process.

Steps to Map Data Accurately for ETL

When extracting, transforming, and loading data (ETL), it is crucial that the data be mapped correctly to avoid inaccurate results. Below are some steps that can help ensure proper data mapping: 

  1. First, identify the source and target data systems. This will help to determine what needs to be extracted and where it needs to be loaded. 
  2. Second, examine the data in both systems and look for any discrepancies. These might include different data formats or structures, missing values, etc. Once any discrepancies have been identified, they need to be resolved before mapping can begin. 
  3. Third, create a mapping document that details how each field in the source data corresponds to a field in the target data. This will serve as a guide during the ETL process. 
  4. Finally, test the mapping to make sure that it is functioning as intended. By following these steps, you can help ensure that your ETL process is successful.

The Four Stages of Analytics in Ascend’s Strategy

At Ascend Analytics, we follow the four basic steps of analytics to generate actionable insights for our clients. 

Step 1- Structured Database

To gain an eagle-eye view of data, we gather data from relevant sources in a structured format that facilitates ETL-based integrated datasets.

Step 2- Reporting Network

Ascend Analytics generates ad hoc reports that make data accessible to the clients by implementing descriptive and diagnostic analytics.

Step 3- Advanced Analytics 

In the third step, we leverage the organization’s frameworks for the generation of prescriptive and diagnostic analytics.

Step 4- Machine Learning

In this step, Ascend Analytics uses iterative models that depend on existing data sources such as multivariate testing for segmentation and scale optimization.

By accurately mapping data during the ETL process, Ascend Analytics leverages data to facilitate data-based decision-making. We centralize data at a single point to ensure that each dataset is accurately analyzed through Ascend Analytics. At Ascend Analytics, our expert team utilizes a blend of reporting, segmenting, growth, predictive, and advanced analytics to drive business value and scale growth.

Types of Data Mapping

Manual Data Mapping

In any data migration or ETL project, one of the first and most important tasks is to map the data from the source system to the target system. This process can be done manually, by creating a spreadsheet that shows how each field in the source system corresponds to a field in the target system. This approach has the advantage of being relatively simple and straightforward. 

However, manual data mapping tools can be time-consuming and error-prone, especially if the source and target systems are large and complex. Additionally, manual mapping can make it difficult to track changes over time and ensure that all data is accounted for. For these reasons, many ETL experts recommend using automated mapping tools instead of manual methods. 

2. Automated Data Mapping

Automated data mapping tools use algorithms to determine the best way to map data from one system to another. This can often be done more quickly and accurately than manual mapping, and it can free up ETL specialists to focus on other tasks. 

As data warehousing becomes increasingly complex, automated mapping will become an essential tool for ETL success. Automated tools can help to speed up the mapping process, reduce errors, and make it easier to track changes. As a result, they can be a valuable asset in any ETL project.

Scale your Business Growth with Ascend Analytics


Now that you know what is data mapping in ETL, partner with Ascend Analytics to unlock your growth potential. That’s why we’ve built a suite of analytics tools that help our clients make better decisions and drive meaningful change. By leveraging artificial intelligence and global best practices, we’re able to provide insights that would otherwise be hidden. And because we’re constantly learning and evolving, 

We’re always on the cutting edge of what’s possible. 

Why Choose Ascend Analytics?

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  1. Witness a 2-3x growth in the ROAS from digital marketing campaigns.
  2. Our analytics services have been used as a benchmark for performance improvement and boosting efficiency by 15%. 
  3. Clients witness a 25%-95% increase in profits and a boost of 5% in retention rate.

Our team of experienced analysts has a deep understanding of data science and knows how to extract insights that can be used to drive operational improvements and top-line growth. We work with clients in a variety of industries, and we have a proven track record of helping them scale their businesses. 

We’ll be happy to show you how we can help you achieve your growth goals. We’re here to help you reach new heights. If you’re looking for a partner who can help you take your business to the next level, contact us today at info@ascendanalytics.co.

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