Defect Scenarios

8 pages in this section.

A diagnosis mental model for schema and data-modeling defects - how to recognize which category a production incident belongs to before reaching for a fix.

Explainer Schema Defects Data Integrity Incident Diagnosis

Defect Scenarios Basics

Learn to identify and fix common database defect scenarios like fan-out joins and orphan rows, using SQL examples and solutions.

Sql Modeling Defect Scenarios Basics Incidents

Fan-Out Join Explosion

Avoid fan-out join explosions that inflate metrics. Learn how many-to-many joins multiply rows and how to aggregate facts correctly.

Sql Modeling Defect Scenarios Joins Cardinality

Missing Foreign Keys

Learn how missing foreign keys lead to orphan rows and application-enforced integrity failures. Discover SQL recipes to detect and fix these issues.

Sql Modeling Defect Scenarios Foreign Keys Integrity

Enum Migration Pain

Sql Modeling Defect Scenarios Enum Migrations

Timestamp Without Timezone Bugs

Sql Modeling Defect Scenarios Timestamptz Timezone

Defect Scenarios Best Practices

Learn best practices for preventing and detecting database defects. Implement CI checks, automate root cause analysis, and improve schema design.

Sql Modeling Defect Scenarios Best Practices List

Defect Scenarios Highlights Summary

A single-page roundup of every highlight bullet from the 7 pages in the Defect Scenarios section, grouped by source page so you can scan all 40 takeaways without opening each article individually.

Highlights Summary Modeling Defect Scenarios

Defect Scenarios

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Defect Scenarios