{
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  "as_of": "2026-10-23",
  "item": {
    "id": "METHOD-0328",
    "kind": "METHOD",
    "title": "SQLiteのSELECTで重複キーを検出する",
    "last_verified": "2026-10-23",
    "currentness": "VERIFIED_AS_OF",
    "revision": 1,
    "requirements": [
      "対象データへの権限",
      "接続先または入力ファイルを確認する",
      "原典と導入済みversionの対応を確認し、権限のある検証用入力・別の出力先を用意する"
    ],
    "suitable_for": "取込前の台帳キーを点検する場面。",
    "unsuitable_for": "検出結果だけで元データを自動削除する用途。",
    "purpose": "SQLiteのSELECTで重複キーを検出する",
    "composition": "SQLite",
    "shortest_path": [
      "重複を許さない列とNULLの扱いを決める",
      "GROUP BYとHAVINGで件数が複数のキーを読む",
      "元の行と重複件数を照合する"
    ],
    "verification": "NULL・空文字・大小文字を含む例で判定基準を確認します。",
    "coverage": [
      "database/SQL",
      "data transformation"
    ],
    "canonical_url": "https://enterprise-ai-dictionary.com/reference/methods/method-0328",
    "retrieval": "FULL",
    "publication": "PUBLIC_NO_ADS",
    "index": "INDEX",
    "ads": "OFF",
    "link_policy": "DIRECT"
  },
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      "scope_note": "公開一次資料に基づく利用経路。",
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      "scope_note": "検証・運用上の関連概念。製品の基本定義とは区別する。",
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