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Sequence 137 — T7 - groupby and validation summaries
Context: Technology Gate B - Programmatic Data Management | Technology Gate
Source: CDMP Master Execution Manual
When / purpose
Create repeatable profiling summaries.
What you should learn
- groupby.
- aggregations.
- exception counts.
- simple score/percentage calculations.
Resources / limits
Technology Competency Roadmap: active T6–T10 only. Detailed Technology Competency Reference: topic detail/readiness only.
Do this in order
- Build a quality summary by source/domain.
- Compare counts before and after a working-copy repair.
- Explain denominator choice.
Meridian application
Use Meridian synthetic files and database only for bounded practice.
Create / save
Profiling summary.
Stop / boundary
Stop before production data engineering, application development, advanced OOP, orchestration or distributed processing.
Completion gate
You can create and explain a reusable exception summary.
NEXT → Sequence 138
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