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How to Deduplicate and Clean Large Datasets Using AI Decision Models

Efficiently clean up large databases by identifying and merging duplicate or near-duplicate records. Use a decision model to get confidence scores for potential matches, allowing for automated merging or manual review.

How to Deduplicate and Clean Large Datasets Using AI Decision Models

Before you start

Tools used

  • Jev

    TypeSafe AI’s model for fast structured decisions, including choices, scores, and boolean probabilities.

    VisitJev

Step by step

The workflow

Follow the sequence once, then adapt the prompts, checks, and handoffs to your own setup.

6 steps

Step01

Prepare Your Dataset

Load your list of records (e.g., company names, user accounts) that you suspect contain duplicates. This can be a large JSON file, a CSV, or a database query result.

Step02

Perform Comparison with Jev

Feed the list of records to Jev. Configure it to compare entries and identify potential duplicates, such as 'Cedar Grove Office Products' vs 'Cedar Grove Office'.

Test on a representative sample first, then batch candidate comparisons and measure cost and accuracy before scaling.

Step03

Get Confidence Scores

For each potential match identified, Jev should return a confidence score indicating the likelihood that the two records are duplicates. This score is key to automating the next step.

Step04

Set a Threshold for Action

Define a confidence score threshold to determine what to do with the matches. For example, evaluate a 99% confidence threshold against labeled examples before enabling automatic merges; keep a backup and review uncertain matches.

Step05

Flag for Human Review

For pairs with a lower confidence score (e.g., between 75% and 99%), flag them for manual review by a human operator. This creates a human-in-the-loop system that balances automation with accuracy.

Step06

Optional: Add Qualitative Validation

For the pairs flagged for review, pass them to a cheap generative model (such as one accessed through OpenRouter). Prompt the model to explain why it thinks the pair is a match, providing a qualitative reason to assist the human reviewer.

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