Introduction to the Less Than Field Check
The Less Than Field check asserts that, on every row, one field holds a smaller value than another field on the same row. Use it to order a term, cap a measure against its own limit, or compare two timestamps written by different systems.
This section is the complete guide to the check. The Deep Dive covers the definition, properties, and full evaluation semantics, explains how anomalies are reported, walks through production examples, and collects best practices; the How-tos are step-by-step tutorials for creating, editing, and deleting a check; the API page documents the payload for programmatic use; and the FAQ answers the most frequent questions.
Next Steps
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How It Works
The complete reference: definition, field scope, the compared field, comparators, NULL handling, filter behavior, and coverage.
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Anomaly Reporting
The anomaly messages the check produces, what the numbers mean, Source Records highlighting, and Custom Anomaly Description.
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Examples
Three production scenarios with sample data, anomaly messages, and the SQL equivalent of what the check evaluates.
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Best Practices
Guidelines for choosing the compared field, using tolerance, and keeping the signal clean.
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Permissions
The team permission each action needs: view, create, edit, archive, restore, and delete.
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Create a Check
Step-by-step tutorial for creating Less Than Field check between two fields on the same row.
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Edit a Check
Step-by-step tutorial for changing the compared field, the tolerance, the filter, or the coverage.
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Delete a Check
Step-by-step tutorial for archiving a check and deleting it permanently.
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Troubleshooting
Common problems with NULLs on either side, tolerance, type mismatches, and anomaly reporting.
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API
Payload shape and field notes for creating Less Than Field check programmatically.
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FAQ
Short answers to questions about the compared field, NULLs, tolerance, and anomaly reporting.