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Learn how to effectively eliminate duplicate data in Dynamics CRM when retrieving state information via API by using FetchXML.
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How to Remove Duplicate Data in Dynamics CRM with FetchXML

When dealing with data retrieval in Dynamics CRM, one common challenge many users encounter is duplicated records. This often becomes particularly troubling when attempting to gather specific information like states within a given country through an API call. In this guide, we will address how to eliminate these duplicates from your API responses using FetchXML—a powerful retrieval tool designed for use with Microsoft Dynamics 365.

Understanding the Problem

Suppose you're trying to fetch all the states under a particular country (for example, the United States). When making your API call, you might use a URL similar to:

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However, upon executing this call, you might get back results that contain multiple entries for the same state. Here’s a quick look at a portion of what the response might return:

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As you can see, multiple entries for "AK"—Alaska—are returned, cluttering your dataset.

The Solution: Using FetchXML

To effectively tackle this issue of duplicated states in your API responses, you can leverage FetchXML—a proprietary query language used in Microsoft Dynamics 365. FetchXML has the distinct advantage of allowing you to specify distinct records directly in your query.

Step-by-Step Guide

Create Your FetchXML Query:
The first step is to craft a FetchXML query that specifies you want distinct values. Here’s a basic structure you’ll need:

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Use Your FetchXML with the Web API Endpoint:
Once you have your FetchXML query ready, you can append it to the Dynamics CRM API endpoint URL like so:

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Make sure to URL-encode your FetchXML if you're embedding it directly into a URL to avoid errors with special characters.

Benefits of Using FetchXML

Clarity: Using FetchXML helps in crafting clear and specific queries without fetching unnecessary duplicate data.

Efficiency: Only retrieves distinct values based on your specified criteria, minimizing data processing on the client side.

Customizability: Easily modify the fetch query to suit different data retrieval needs in Dynamics 365.

Conclusion

By incorporating FetchXML into your data retrieval process, you can effectively eliminate duplicate records and streamline the information you work with in Dynamics CRM. This not only improves performance but also enhances the quality of your data analysis, leading to better decision-making.

Now, you're equipped to clean up your API responses and make your Dynamics CRM experience more efficient. Happy querying!