BrainTrust Investment Lab › Band 4 — Managing the ETL Environment
Band 4 — Managing the ETL Environment · book p.490 · grain: one station per walk sheet
Unglamorous and decisive: at hundreds of millions of rows, putting data in order is real engineering. It is engineered here — measured like everything else, never left to luck.
No walk sheets yet — this station begins when the ladder reaches it. Nothing is walked ahead of the lowest incomplete rung.
The contract — what each step must produce
| # | step | page | what the book requires |
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