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      <title>Python SQLAlchemy 2.0 實戰：Typed ORM、Session 與查詢模式</title>
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follow-up note: 這篇和既有 sqlite3、FastAPI、Pydantic 文章有相鄰背景，但角度不同：本文專注 SQLAlchemy 2.0 的 typed ORM、Session 邊界、查詢模式與資料存取層，不重講原生 SQL 或 Web API 入門。
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