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		<title>Upsert on 春江暮客</title>
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				<title>Python SQLite 更新避坑：用 UPSERT 代替 REPLACE，保留关联记录</title>
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				<description>在内存数据库中复现 REPLACE 级联删除，对比 UPSERT 保留关联记录与创建日期，并验证新增、重复更新和失败回滚。</description>
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