Chamber 70 · Pattern Vault
Vault Derived
Subquery in FROM
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Briefing
Average tension per weaver lives in a derived table — query the vault stats, then join names to the result.
Objective
Return weaver name and avg_tension from (SELECT weaver_id, AVG(tension) … GROUP BY) AS stats joined to weavers.
Hint
Derived table in FROM with AVG + GROUP BY, JOIN weavers, ORDER BY name.
Chamber schema
weavers2 colsWeavers in the pattern vault
threads3 colsVault thread readings
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