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Sequence 143 — T8 - controlled read/write and validation
Context: Technology Gate B - Programmatic Data Management | Technology Gate
Source: CDMP Master Execution Manual
When / purpose
Use Python/PostgreSQL together for a repeatable bounded workflow.
What you should learn
- read_sql.
- Controlled to_sql/write awareness.
- Row-count validation.
- Rollback/rebuild thinking.
Resources / limits
Technology Competency Roadmap: active T6–T10 only. Detailed Technology Competency Reference: topic detail/readiness only.
Do this in order
- Load or write a small working dataset to staging.
- Validate row counts and key fields.
- Rerun from a clean working state.
Meridian application
Use Meridian synthetic files and database only for bounded practice.
Create / save
Repeatable load/validation script.
Stop / boundary
Stop before production data engineering, application development, advanced OOP, orchestration or distributed processing.
Completion gate
You can rerun a bounded workflow and prove what changed.
NEXT → Sequence 144
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