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Unverified50% confidenceFactExact time

笛卡尔积是指在SQL的JOIN操作中缺少正确的连接条件,导致两张表的每一行都与另一张表的每一行组合;如果两张表各有10万行,将产生100亿行结果

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50%
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Long-term
Relevance
8/30/2026
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