Developer's Basketball Database Mixed Up Teams and Games Due to Flawed ID Logic

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A data engineer building a basketball analytics platform, RED Observatory, found that his EuroLeague database for Olympiacos's 2023-24 season was incomplete and inaccurate. All 489 player-match records were assigned to the away side, and fixture dates and final scores were missing. Two Bayern Munich games were also linked to Barcelona because team identifiers were generated from the first three characters of club names. Both "FC BARCELONA" and "FC BAYERN MUNICH" produce the same key, so the importer merged the two clubs' records. The case shows how valid source data can become misleading during transformation and storage.

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