Tag:data quality

Articles tagged "data quality".

• 31 MIN READ•Sep 28, 2026

  Twelve Queries That Pass Every Schema Check and Still Return the Wrong Number

  Twelve query patterns that pass schema validation and still return wrong numbers, with detectors, required metadata, and tested code for each.

  AI AgentsSemantic LayerData Quality
• 30 MIN READ•Sep 2, 2026

  Data Quality Tooling Compared: Great Expectations, Soda, dbt Tests, and Anomaly Detection

  A comparison of Great Expectations, Soda, dbt tests, and anomaly detection, and a layered design that uses each where it fits.

  Great ExpectationsSodadbt
• 30 MIN READ•Aug 19, 2026

  Goal-Directed Data Quality Agents: Anomaly Quarantine on Apache Iceberg

  Goal-directed data quality agents that watch Apache Iceberg tables, detect anomalies, and quarantine suspect data safely with snapshot isolation and branches.

  Apache Icebergdata qualityAI agents
• 30 MIN READ•Jul 25, 2026

  Freshness Is a Contract, Not a Note on a Dashboard

  Data freshness needs to become an engineering contract with a measurable value, an owner, and consequences.

  data freshnessdata qualityapache iceberg
• 14 MIN READ•Jun 22, 2026

  The Context Layer for AI Agents

  A semantic layer is necessary, but agents also need lineage, quality, freshness, compliance, and ownership context.

  AI metadatalineagedata quality
• 5 MIN READ•Feb 18, 2026

  Testing Data Pipelines: What to Validate and When

  Ask an application developer how they test their code and they'll describe unit tests, integration tests, CI/CD pipelines, and coverage metrics. Ask a data e...

  data engineeringbest practicestesting
• 5 MIN READ•Feb 18, 2026

  Data Quality Is a Pipeline Problem, Not a Dashboard Problem

  When an analyst finds null values in a revenue column, the typical response is to add a calculated field in the BI tool - `IF revenue IS NULL THEN 0`.

  data engineeringbest practicesdata quality