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Careful with NULL in join keys, they'll drop rows in an inner join.
I have read the docs but real-world tradeoffs are unclear. What would you optimize first?
Context: Readable CTE chain vs one giant query, performance difference?
Happy to share schema snippets or metrics if useful.
Careful with NULL in join keys, they'll drop rows in an inner join.
Consider DuckDB or Polars for this size before spinning up a cluster.
Yes, the partial index was the win for us too.
Prefer a staging table plus validation gate before promoting to prod tables.
Document the grain decision, most BI bugs turn out to be grain bugs.
Sometimes the real fix is a product change so you stop needing that join at all.
Note that merge on Delta still needs unique keys defined correctly.
Start with the execution plan, numbers beat guesses.
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No cluster. No install. Just the tab.